Except that France was allied to Austria between the seven year war and the revolution so its unlikely to oppose it. Prussia is out of the picture and Sweden proved to be a non entity in the seven years war. That only leaves Russia who at the time is more concerned with conquering as much of ottoman territory as it can while controlling Poland and I dont think would go to war with Austria over a HRE issue which is monetary wise a loss to Austria as the Austrian Netherlands paid much more than Bavaria could be expected. The only ones unhappy are the british and the dutch but good luck for them in forcing Austria and France to do anyithing in a continental matter without a major ally.
The french Austrian alliance was a short lived one.
Both allies had been very disappointed by their results in the 7 years war.
And after Maria Theresa’s death in 1780, it was but a piece of paper to be torn apart at the first opportunity. Austria even considered allying with Britain in the American Revolution War.
And even under Maria Theresa, the alliance did not mean one ally would gladly accept a massive increase in the other’s power without compensation for himself.
The French would not work for the emperor of Austria the way they had worked for the king of Prussia during the war of Austrian succession.
So basically, the French agreeing to Austria gaining Silesia and Bavaria would mean they would obtain at least the austrian Netherlands and possibly some other territories in Rhineland.
This would imply the Wittelsbach losing Bavaria when the Bavarian branch becomes extinct and remaining in Palatinate.