Valve is investing a lot of resources in Wine/Proton. dxvk is being actively maintained which is very good. Same with Vulkan.
For how long do you think this can go on? I can’t think of it as a profitable venture which is unfortunately necessary for a project to have a long life. Especially with many newer AAA games not having Wine compatibility (correct me if I am wrong here) because of reliance of DirectX 12 or some ring-0 level anticheat. With the hegemony of Microsoft on consumer PC market and especially PC gaming, I don’t know how long the current momentum will persist, though I am grateful for the work done so far.
There’s lots of indie games that have Linux binaries. The game engines Unity, Godot and Unreal are very popular among indie devs and all support Linux in principle (if you add libraries to your project without Linux support, then it obviously doesn’t work anymore).
For AAA titles, I’ve also lost track. It used to be special when a AAA title ran on Linux, now it’s special, if it doesn’t run, but that’s via the use of Proton and the Windows binaries.
I know, Paradox Interactive frequently publishes games with native Linux support, e.g. Stellaris, Cities: Skylines, Europa Universalis, Crusader Kings.