I assume the most interesting requirements are about data residency. And that probably 1) can be avoided by just making sure EU data is stored in the EU, US data in the US, and looking up a foreign region profile (which is rare) would need to a a pure API proxy request which is not allowed to store anything in the local region and probably has some kind of per-request authorization to do this.

I certainly have not spent any time to look into the actual legislation - so don't take this as "everything would be fine" - but I feel a solution could be found that governments would be ok with if FB would be willing to spend the engineering effort.