Can someone recommend a 2FA app that can provide the users with confidence?

I don't want to use Google Auth because I have absolutely no trust is this company and how unreliable they are with their products.

I currently use Authy but it's free, offered by a company (Twilio) and I can't really see what their endgame is here. So they could drop the service one morning because it's not useful for their main business anymore. They already announced dropping their desktop apps.

Say in another way : is there a security company somewhere selling a 2FA app and in which it's easier to put trust?

Sure Bitwarden can provide TOTP, but then I still need to put MFA on my Bitwarden account itself.