Sorry, you're mistaken. Devs are fed up with Apple constantly changing and breaking macOS every single year - not to mention the power user hostility (f which devs are surely a decent proprtion) of big sur. The whole OS is just about making the Mac an iPhone accesory.i think the reason why we are not seeing much apps is that the developers are trying to find a way, how do they milk the users for more cash for those apps...
Apple have long ago made it too hostile for hobby programmers (including me) to continue using macOS, and they're well on the way to excluding all but the biggest sofware developers.