Is this some sort of a convenience feature hidden behind a paywall to justify purchasing their subscriptions or does generating the codes actually cost money? If the latter is the case, how do applications like Aegis do it free of cost?
The reason that 2fa exists is not to protect you if someone gets their hands on your device. It’s to protect you if your “static” credentials leaked from a providers’ database or you otherwise got phished. Using a password manager to handle mfa is totally reasonable.