Irishrebel16 Said:
"How do I disable screen time for child: How do I disable screen time passcode for my child’s phone? I don’t remember setting it up and we are on 8 failed attempts. I need to reset it to trade it in, but can’t do that without this passcode."
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Go Here: If you Forgot your Screen Time Passcode - Apple Support
This is all a matter of security (something you would have agreed to upon setting up Two-Factor Authentication). So, if there ends up being no successful solution to this, then take this as a learning experience knowing to always keep the original packaging and receipt so that this reset can be performed.