Universal Blue has some really good ideas. I really think immutable and atomic updating linux distros are the future. Most applications have flatpaks available.
Bazzite has alot of gamer forward features, has Nvidia specific builds, and even supports a SteamDeck replacement version of their OCI images.
Even though people may not like Fedora, I think universal Blue solves a lot of the Fedora style problems people experience.
There are also BlendOS and VanillaOS but I haven’t tried them with NVIDIA GPUs.