full markdown should work in replies, was hardcoded to simple irrespective of prefrence.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/model/relation/RelationService.kt

@@ -104,9 +104,11 @@ interface RelationService {
      * by the sdk into pills.
      * @param eventReplied the event referenced by the reply
      * @param replyText the reply text
+     * @param autoMarkdown If true, the SDK will generate a formatted HTML message from the body text if markdown syntax is present
      */
     fun replyToMessage(eventReplied: TimelineEvent,
-                       replyText: CharSequence): Cancelable?
+                       replyText: CharSequence,
+                       autoMarkdown: Boolean = false): Cancelable?
 
     /**
      * Get the current EventAnnotationsSummary

matrix-sdk-android/src/main/java/org/matrix/android/sdk/api/session/room/send/SendService.kt

@@ -60,9 +60,10 @@ interface SendService {
      * Method to quote an events content.
      * @param quotedEvent The event to which we will quote it's content.
      * @param text the text message to send
+     * @param autoMarkdown If true, the SDK will generate a formatted HTML message from the body text if markdown syntax is present
      * @return a [Cancelable]
      */
-    fun sendQuotedTextMessage(quotedEvent: TimelineEvent, text: String): Cancelable
+    fun sendQuotedTextMessage(quotedEvent: TimelineEvent, text: String, autoMarkdown: Boolean): Cancelable
 
     /**
      * Method to send a media asynchronously.

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/DefaultRelationService.kt

@@ -131,8 +131,8 @@ internal class DefaultRelationService @AssistedInject constructor(
         return fetchEditHistoryTask.execute(FetchEditHistoryTask.Params(roomId, eventId))
     }
 
-    override fun replyToMessage(eventReplied: TimelineEvent, replyText: CharSequence): Cancelable? {
+    override fun replyToMessage(eventReplied: TimelineEvent, replyText: CharSequence, autoMarkdown: Boolean): Cancelable? {
-        val event = eventFactory.createReplyTextEvent(roomId, eventReplied, replyText)
+        val event = eventFactory.createReplyTextEvent(roomId, eventReplied, replyText, autoMarkdown)
                 ?.also { saveLocalEcho(it) }
                 ?: return null
 

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/relation/EventEditor.kt

@@ -67,7 +67,7 @@ internal class EventEditor @Inject constructor(private val eventSenderProcessor:
         val roomId = replyToEdit.roomId
         if (replyToEdit.root.sendState.hasFailed()) {
             // We create a new in memory event for the EventSenderProcessor but we keep the eventId of the failed event.
-            val editedEvent = eventFactory.createReplyTextEvent(roomId, originalTimelineEvent, newBodyText)?.copy(
+            val editedEvent = eventFactory.createReplyTextEvent(roomId, originalTimelineEvent, newBodyText, false)?.copy(
                     eventId = replyToEdit.eventId
             ) ?: return NoOpCancellable
             updateFailedEchoWithEvent(roomId, replyToEdit.eventId, editedEvent)
@@ -78,6 +78,7 @@ internal class EventEditor @Inject constructor(private val eventSenderProcessor:
                     replyToEdit,
                     originalTimelineEvent,
                     newBodyText,
+                    true,
                     MessageType.MSGTYPE_TEXT,
                     compatibilityBodyText
             )

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/DefaultSendService.kt

@@ -97,8 +97,8 @@ internal class DefaultSendService @AssistedInject constructor(
                 .let { sendEvent(it) }
     }
 
-    override fun sendQuotedTextMessage(quotedEvent: TimelineEvent, text: String): Cancelable {
+    override fun sendQuotedTextMessage(quotedEvent: TimelineEvent, text: String, autoMarkdown: Boolean): Cancelable {
-        return localEchoEventFactory.createQuotedTextEvent(roomId, quotedEvent, text)
+        return localEchoEventFactory.createQuotedTextEvent(roomId, quotedEvent, text, autoMarkdown)
                 .also { createLocalEcho(it) }
                 .let { sendEvent(it) }
     }

matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/room/send/LocalEchoEventFactory.kt

@@ -198,6 +198,7 @@ internal class LocalEchoEventFactory @Inject constructor(
                                  eventReplaced: TimelineEvent,
                                  originalEvent: TimelineEvent,
                                  newBodyText: String,
+                                 autoMarkdown: Boolean,
                                  msgType: String,
                                  compatibilityText: String): Event {
         val permalink = permalinkFactory.createPermalink(roomId, originalEvent.root.eventId ?: "", false)
@@ -205,9 +206,9 @@ internal class LocalEchoEventFactory @Inject constructor(
 
         val body = bodyForReply(originalEvent.getLastMessageContent(), originalEvent.isReply())
         // As we always supply formatted body for replies we should force the MarkdownParser to produce html.
-        val newBodyFormatted = markdownParser.parse(newBodyText, force = true, advanced = false).takeFormatted()
+        val newBodyFormatted = markdownParser.parse(newBodyText, force = true, advanced = autoMarkdown).takeFormatted()
         // Body of the original message may not have formatted version, so may also have to convert to html.
-        val bodyFormatted = body.formattedText ?: markdownParser.parse(newBodyText, force = true, advanced = false).takeFormatted()
+        val bodyFormatted = body.formattedText ?: markdownParser.parse(body.text, force = true, advanced = autoMarkdown).takeFormatted()
         val replyFormatted = buildFormattedReply(
                 permalink,
                 userLink,
@@ -384,7 +385,8 @@ internal class LocalEchoEventFactory @Inject constructor(
 
     fun createReplyTextEvent(roomId: String,
                              eventReplied: TimelineEvent,
-                             replyText: CharSequence): Event? {
+                             replyText: CharSequence,
+                             autoMarkdown: Boolean): Event? {
         // Fallbacks and event representation
         // TODO Add error/warning logs when any of this is null
         val permalink = permalinkFactory.createPermalink(eventReplied.root, false) ?: return null
@@ -394,9 +396,9 @@ internal class LocalEchoEventFactory @Inject constructor(
         val body = bodyForReply(eventReplied.getLastMessageContent(), eventReplied.isReply())
 
         // As we always supply formatted body for replies we should force the MarkdownParser to produce html.
-        val replyTextFormatted = markdownParser.parse(replyText, force = true, advanced = false).takeFormatted()
+        val replyTextFormatted = markdownParser.parse(replyText, force = true, advanced = autoMarkdown).takeFormatted()
         // Body of the original message may not have formatted version, so may also have to convert to html.
-        val bodyFormatted = body.formattedText ?: markdownParser.parse(replyText, force = true, advanced = false).takeFormatted()
+        val bodyFormatted = body.formattedText ?: markdownParser.parse(body.text, force = true, advanced = autoMarkdown).takeFormatted()
         val replyFormatted = buildFormattedReply(
                 permalink,
                 userLink,
@@ -517,11 +519,12 @@ internal class LocalEchoEventFactory @Inject constructor(
             roomId: String,
             quotedEvent: TimelineEvent,
             text: String,
+            autoMarkdown: Boolean,
     ): Event {
         val messageContent = quotedEvent.getLastMessageContent()
         val textMsg = messageContent?.body
         val quoteText = legacyRiotQuoteText(textMsg, text)
-        return createFormattedTextEvent(roomId, markdownParser.parse(quoteText, force = true, advanced = false), MessageType.MSGTYPE_TEXT)
+        return createFormattedTextEvent(roomId, markdownParser.parse(quoteText, force = true, advanced = autoMarkdown), MessageType.MSGTYPE_TEXT)
     }
 
     private fun legacyRiotQuoteText(quotedText: String?, myText: String): String {

vector/src/main/java/im/vector/app/features/home/room/detail/composer/MessageComposerViewModel.kt

@@ -406,13 +406,13 @@ class MessageComposerViewModel @AssistedInject constructor(
                     popDraft()
                 }
                 is SendMode.Quote   -> {
-                    room.sendQuotedTextMessage(state.sendMode.timelineEvent, action.text.toString())
+                    room.sendQuotedTextMessage(state.sendMode.timelineEvent, action.text.toString(), action.autoMarkdown)
                     _viewEvents.post(MessageComposerViewEvents.MessageSent)
                     popDraft()
                 }
                 is SendMode.Reply   -> {
                     state.sendMode.timelineEvent.let {
-                        room.replyToMessage(it, action.text.toString())
+                        room.replyToMessage(it, action.text.toString(), action.autoMarkdown)
                         _viewEvents.post(MessageComposerViewEvents.MessageSent)
                         popDraft()
                     }