While eIDAS seems like a great idea to coerce member states into adopting a common standard, it just also happens to sneak EU-centralist ideology in, and total digital surveillance is the 0th application of that ideology.

The big catch with EU is: once you opt in, opting out is very difficult.

Open any law on produce, construction, cars, industrial equipment (and a million others), and you'll find thousands of specs and standards mandated by law, and for a reason.