Screen time passcode reset not working

Do you have Family sharing

if yes check it's might be the screen time done , by Family organizer they the only way to rest it from organizer device

also review

If you forgot your Screen Time passcode - Apple Support

I'm not aware of anything beyond the Apple Support document directions for resolving the screen time pass code. I included a link to the document below, however, in the document is a reference point minimum 13.4 OS version. You mention iOS 12, I'm assuming that applies to IpadOS as well. So I'd first suggest upgrading your iPad to the latest version then follow the document.

If you have an iPad model that is no longer supported for versions iPad 15.x, I'd upgrade to that minimum 13.4 threshold. If you have an iPad that is no longer supported and it doesn't support above your current 12 version, I don't have any suggestions (maybe another poster will) other than purchasing a more recent iPad model.

If you forgot your Screen Time passcode - Apple Support

aalskdjfhg123 Said:

"Screen time passcode reset not working: I forgot my screen time passcode. I pressed forgot passcode and entered my apple it but it just adds another failed attempt when i try."

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Troubleshooting a Locked Device:

Hold it Right There!

Enter the passcode incorrectly too many times, and you'd likely be locked out for good. So, hold it right there! It would be the one you've always entered. If you do not know it, then look for it in a location you may have stored it in.

No Success?

Contact Apple support:

If you cannot get the above link to work, then contact Apple Support.

Apple Contact Info:

• Contact Us - Choose Locations
• Proceed from there, as necessary

Why the Wait:

Phone calls are taking a bit to go through at the moment, due to lots of calls. With the Coronavirus Pandemic, many are at home at the moment, with much time on their hands to contact Apple. So, just stay on the line, and you will get through :)