The German eID stack does also work well, just as the Austrian one does.

Tbh I like the German one even better because you need your physical Identity Card and can use your phone as the reader

Maybe better, but less useful. I don't carry my Identity Card at all, unless I cross the border within EU where it is used. All other functions I have in our country app. To which I can log in using physical card, but I have other options that are online.