Phone keeps vibrating even if all notifications are deactivated/silenced

Hi! I’m having problems with my Fairphone 4, it keeps vibrating even if all notifications are deactivated. I really don’t know what to do, it is impossible to use it for good 10/15 minutes every time I unlock the screen. Even if I put the phone in “Do not disturb” mode it keeps vibrating. It is driving me crazy.

My OS version is 1.91

Regain your privacy! Adopt /e/OS the unGoogled mobile OS and online servicesphone