My phone won't let me change my passcode and the screen time password won't let me change with my Apple ID.. I think my phone has been compromised!

did you ever find out how to fix it? i have the same issue and apparently nobody at apple can help lol

and it's not letting me change by my Apple ID passcode

Or do you mean Apple ID password?

If so read again -> Related Article -> If you forgot your Apple ID password

Then see this Apple article: What to do after you change your Apple ID or password

What to do after you change your Apple ID or password - Apple Support

If you forgotten your passcode, see this Apple article: If you forgot your iPhone passcode

If you forgot your iPhone passcode - Apple Support

If you can’t get your iPhone to show the recovery mode screen and you need help, contact Apple Support.

See also the following Apple articles:

Recognize and avoid phishing messages, phony support calls, and other scams

Recognize and avoid phishing messages, phony support calls, and other scams - Apple Support

If you think your Apple ID has been compromised

If you think your Apple ID has been compromised - Apple Support

thanks