What do you do when your iphone screentime isn't showing forget password?
How to unlock screentime when it's not showing you forget password?
Question marked as
If you follow these instructions very carefully—>If you forgot your Screen Time passcode - Apple Support
and watch this video:
If you still can’t reset the passcode you will have to restore your phone to factory settings and NOT restore a backup—>Restore your iPhone, iPad, or iPod to factory settings - Apple Support