passcode kids account ipad10

I dont know the passcode to change the screen time limit on my sons ipad. my husband set it all up so i dont know how it works. ive looked everywhere for help.

Please tell me there is a way to do it without reseting the whole ipad he has so many games on there that cant save progress.

he has an ipad10 kids account. i have all the login information for the parent account and a seperate apple mac to do changes. i just dont know how!!!!