I'm not sure either. I've looked at this other document: https://bmi.usercontent.opencode.de/eudi-wallet/eidas-2.0-ar...

It seems to imply that the already existing way of authenticating via eID, which is the auth chip present on our ID cards, will still work, if I read it correctly? I understand OP's link to refer to a new, alternative system, that can be used without the ID card.

But take this with a grain of salt, I'm not very well informed about the whole topic.