I self host Bitwarden (Vaultwarden) so I just use the built-in TOTP authenticator in the Bitwarden app. It’s nice to have it all in one place + having auto copy and paste when I log in. And because I self host, it’s all backed up securely and with (as far as I know) no real backdoors.
ETA: just realized what community this is in. people that replied to me I’m sorry lmao, I’m not a nut about this kinda stuff and I’m by no means recommending this just like using it this way for convenience factor and to keep the likes of google out of my password.