Proton Pass should not have unlimited 2FA locked behind a subscription.

There is a valid concern about having only 3 available 2FA logins in a password manager on the free version because you could get locked out of your accounts if you skip a month on your payment.

On Proton Pass, you could lose the unlimited hide-my-email aliases and the dark web monitoring, because those are power user features, but an essential security method like 2FA shouldn't be lost since it's not an added feature on top of password management, It's needed for logging in, and it's not an advanced feature like monitoring the dark web or hide-my-email.