I have used many different 2FA, but the one for Lemm.ee doesn't work like any others I have used and I can't get it to work.

Usually, it gives you a QR code to scan into an authenticator or a code you can enter manually. However, the 2FA here is not like that. It gives a link that opens up passwords in my settings on my Mac or my iPhone. My authenticator is not included in the list.

Does anyone have ideas on how to get the 2FA to open in an authenticator app instead my password settings?