1. The chat protection feature should not be so separate from each other from chat to chat, like WhatsApp, a centralized space for locked chats would probably be better, making it less stressful to open multiple chats. I would also enable the fingerprint reading for the chats, since if applied to many, it can be also stressful to insert different pins without using the fingerprint every time.
2. The archive posts are interesting but seem very detached from real-use cases since if a post is hidden and can be accessed anyway by the user that reads them, there is not much of a need to hide them in a separate folder. What could be more useful is maybe to use an alternative to #hashtags and separate every post (or not but default) with a tag, like it is now available with saved messages in the official release, to let the user only read posts from a certain tag.

No problem brother. For the archive-posts feature, if it is from an admin perspective it is indeed more interesting and more applicable. Amazing designs anyway!