Fallen nation diplo trade (when guerillas)

[vahadar]

I read a confirmation somewhere else (i cant find it again) that it was now impossible to make diplo trades with fallen nation, logical, but when they have guerillas that take cities, thus coming back on map, should be able to.
If i'm not wrong it was possible in early access.

This lead to another question, do guerillas pop only in dead nation loyalty zone? if so what about Czechoslovakia? (no loyalty control).

So i'll annoy you with one last question : aside from modding events, how is it possible in the current game to support the rebirth of a nation? I know liberate is broken at the moment, but does supporting guerilla can make those hillibillies with hunting rifles take over their fallen nation? I never tried in previous SR games.