How to reset a kid's forgotten phone lock-screen password?

My 6-year-old grandson has now made two (ancient) phones useless by changing his password, and then forgetting it. He only uses phones in my house every few weeks. On my Windows 10 LAPTOP, he has a "Standard" account. I'm the Administrator. Using that configuration, If he forgets his password, I simply reset it and then tell him the value. Is it possible to do the same thing on an Android phone? I think there are apps to prevent him downloading stuff, but I haven't found any app that would allow an Administrator to reset a forgotten password. Thanks.