How to remove Family Link parent access code on phone?

First of all, you have to remove your phone from the Family Link program.

You can do that in the following way: Go to Settings Family Link My Family Link. Tap the Remove my Family Link button. Now it is time to remove the account. If you are the only person using your phone, tap the Delete my Family Link account button. If there are other people using your phone, you have to ask them for permission to remove their accounts.