I have not received any notification from the store about any removal. It should be available in France as well. But the Play filter is not based on where you are, but where your account was created from. 

 And also the app is limited to +18  

 J'ai testé sur un autre smartphone. L'app Amethyst est bien dispo sur le playstore français. Je vais regardé pourquoi elle ne remonte pas sur le mien...