You can put TOTP 2FA keys on anything. A yubikey. An app on your computer. In your password manager. Hell, build your own device from parts: https://hackaday.com/2018/01/04/two-factor-authentication-wi... . If you're forced to use SMS-based 2FA, I can't give you anything but my condolences because SMS-2FA is stupid. But most 2FA systems work with the very flexible TOTP keys so I don't understand the complaints.