In the EU its not uncommon to receive phone calls from other countries. Just the other day I received a large package and the driver called with an international number to make sure I would be home to receive it.

Delivery companies would adapt and drivers would have work-only dumb phones with correct country SIMs. Problem is, spam & scam callers would adapt as well.

Those calls won't be from a random country on the other end of the world that is outside the purview of EU regulations though.