Can't you add a security key like a Yubikey? Do they let you do that without requiring your Google Authenticator / TOTP secret? What about adding someone who

Can't you add a security key like a Yubikey? Do they let you do that without requiring your Google Authenticator / TOTP secret? What about adding someone who can get access to your email after six months of inactivity? Maybe they let you add that without your lost google authenticator? It'd be better than nothing.