i know i can log in into them because like i said it recognizes the email meaning the apple id.
true, you cant delete them yourself but you can request them to be deleted in the privacy page that apple created for you to delete the account (wich takes around 20-30 days), and also on that page you can request a copy of the data apple has on you.
i dont know if you have that on the US but here in europe we have it.
the problem with that is that, to put a request for them to be deleted you need to log in with the apple id and like i said i dont remember the password.
to recover the password i have to answer the security questions i created when i created the apple id over 10-15 years ago and there is just no way i remember that.