My question:
How do I check for a deleted or archived thread or does it have a recycle bin or trash? Already explored it but not sure if I missed it.
you can actually find answers to all your questions in Telegram FAQ, via your app or
web there is no such thing as "deleted or archived thread" in telegram... once deleted it's gone
Q: How do I delete my account?If you would like to delete your account, you can do this on the
deactivation page. Deleting your account permanently removes all your
messages and
contacts. All groups and channels that you've created are orphaned and left without a creator but admins retain their rights.
Q: What happens if I delete my account?As was just mentioned above, all your data will be flushed from our system: all messages, groups, and contacts associated with your account will be deleted. That said, your contacts will still be able to chat in the groups that you have created, and they will still have
their copy of the messages you sent them. So if you want to send messages that can vanish without a trace, try using our
self-destruct timer instead.
Are there any feature in Telegram about deleting account? If so, does it will also delete our message thread once they delete their account?
sure is, you can delete/deactivate your account on this
deactivation page all messages connected to the account will be deleted on cloud side, but whatever copies on your side remains
however, a user can force delete all his messages (in group or 1-to-1 chat) before deactivating his account
that means he can delete his messages on your device too and leave no trace at all