Valve uses MoltenVK[1] on their own games. They have used it since 2018 for Dota 2[2], but I can't find a lot of uptake by others.

[1] https://github.com/KhronosGroup/MoltenVK [2] https://www.khronos.org/news/permalink/vulkan-support-for-do...

My experience from nearly 20 years of gaming on Linux: Just because a developer can support a platform, doesn't mean they will (sadly). It becomes less likely with any additional complications such as special libraries.