App stores (like google play, apple, microsoft cartels) usually would ban whichever apps if they could not have an access to user’s data. Unless app has specific version design allowed by app store’s policy, such as Blokada lite for example. So I would say any privacy-respecting apps under FOSS are compromised the moment they work with non-privacy-respecting OS.
Users shouldn’t be relying on FOSS apps for privacy on OS run by those cartels. But why on the Earth FOSS would create apps to work with those OS? Probably an attempt to draw more users into switching by educating them. But it just stinks a trap whenever Microsoft turns welcoming to work with linux.