As said, Germany wasn't and wouldn't be very much interested with what kind political France they would deal with, as long as it goes along with the treaties conditions and demands.
But ... France might become "troublesome" in the followong time (years) due to internal fighting, who has to take the blame for loosing the war, due to a very "rough" economical problems (of which will most likely reparations to Germany play a big part of).
IMO ther could be a window of opportunity for regional autonomy-movements, maybe leading to a new kind of constitution in which these "regions" have much more ... autonomy from the Paris centre.
(Some of might even be exploited by Germany, maybe a "naval base"-agreement with an independant Bretagne ?)
However, this ofc depends on how "strong" such autonomy-movement were ... already at the end of the Great War ITTL.
How strong were they IOTL ?
Were there some "breton", "occitan", "provencal", "basque" or perhaps even "normandaise" movements to speak of ?