How do I properly unlink Apple ID login from Camee and Chatrandom?

Good time of day.Ihave a problem using a feature inside the phone and on the official Apple website,namely the Apple Login feature.When you delete or unlink a site or application(the specific two are Camee and Chatrandom), nothing happens,while the rest of the applications are quietly unlinked.I haven't been able to solve this problem for a month. The methods I tried: updating iOS,trying to delete from three different devices,clearing the cache,logging back into my account,rebooting all devices,using a VPN, contacting chat and phone support,none of these methods helped.

[Re-Titled by Moderator]

Original Title: Sign in with Apple