The AFD is openly campaigning on it and they are currently the most popular parti in Germany.

The French RN is not openly campaigning on leaving anymore since its pretty scary to the voters but the intention of Le Pen is to hold a referendum to ask the French people to recognize the supreme rule of French law above EU law which would act as a soft exit since that means that France would no longer be bound by directives and other regulations which it doesnt agree with.

The other major parti France unbowed is even more direct and wants to set "fire" to some of the debt which would most likely trigger a Euro/Eu crisis and force either the ECB to bail out France or force France out of the Euro.