If you want To know if someone blocked your number on Android, then follow below given steps:-

  • Firstly, Go to the Phone app and tap the three dots which is present at the bottom of the screen.

  • After that, go to the options of Settings and then Blocked numbers

  • If you want to see who's blocked a particular contact, tap that contact's name and then tap Block caller ID.

  • Scroll down to see who has blocked you or enter the phone number of someone who's blocked you into the search bar at the top of the screen, then tap it when it appears in the list below all contacts on your phone.

Read more here:- https://worldzo.net/how-to-know-if-someone-blocked-your-number/