go to settings -> privacy & security -> see active sessions, u can see if anyone logged in with ur account

Privacy and security wst active session lay kante phone version wchi lela kale hack tedergehal malet nw

Go to activity session kza kant slk wchi lela slk kayeh you are most probably hacked

Telegram will notify you who login in to your accout

https://youtu.be/V1WczjwLscI