Though they recommend their own app, id.me directly supports any standard compatible authenticator app. I use it with Google Authenticator TOTP. It's also SOTA for creating and accepting passkeys on ChromeOS as well as Android. Probably Apple, too!
Other built-in available MFA methods include: security key; NFC mobile security key; Push Notifications (id.me app); text message or phone call; and passkeys.
Other built-in available MFA methods include: security key; NFC mobile security key; Push Notifications (id.me app); text message or phone call; and passkeys.