otp in Aegis or elsewhere can be made the only 2fa that Google asks for or at least make it show up as an alternative.
I guess you still have remnants of Google devices tethered to your account.
This presumes you’re lucky and are still authenticated on some other device and browser: If you visit https://myaccount.google.com/security what do you see?
If a Google device isn’t still around or is already flashed with non-stockrom you can’t actively log out (that is the officially suggested method to turn of Google Prompts). But you can issue revocations at Manage all devices in an authenticated browser.