How to find apple id password on ipad

Recover or Reset Forgotten Apple ID or Password on iPhone & iPad
Apple provides multiple ways to recover a forgotten ID login or password, and you can start the recovery process either directly on an iPhone, iPad, or iPod touch, Mac

4 Easy Ways to Reset iPad without Apple ID or Password
You can learn howto factory reset iPad without AppleID or password in 2 ways from this post, even if Find My iPhone is on (iOS 12 oniPad supported).