You need to expand the account list and alt-shift-right-click the account you want to the clear unread count for
♀️ Nimueh Lady Of The Lake ♀️
I never knew about this myself and am using another client for Telegram because there is no (simple) way to mark ALL chats as read (and scroll to the end of all of them) with a single click. If other clients can do it then why not Telegram itself? It's a great (and helpful) options, so please give us an easy way to do it and post it in your changelogs ... lots of users that have many chatrooms will love this!!!
Amir𓄂𓆃 |almost afk until July
Agree Custom telegram apps force most of us to using them cuz normal telegram doesn't have their abilities