Screen time password on child’s phone

I am having an issue with screen time passwords on my daughter’s phone. I have set

the password on my phone through the screen time function. If I go into screen time from her phone, and for example try to change any of the settings, like downtime, the password is the one I have set up and it is fine. However, if she has reached time out on one of her apps, the password to override the screen time restrictions is a different four number password. I’ve tried everything and I cannot see why this password is different or how I am supposed to change it. Grateful for any insights. Thanks.