except eBay

Or Google, very user hostile because it makes me choose between giving them my phone number or installing their spyware app on my phone.

Google's authenticator is just a standard TOTP app. You can use any app, including Aegis.

Google hides TOTP option until you create a method that uses your mobile number or google app. Only after that you can change it to TOTP.

I use Yubikey USB to authenticate with Google.