Maybe Fedora Silverblue? Bluefin is built on top of Fedora anyways. You will find more support online for Fedora Silverblue/Kinoite over Bluefin.

I know Bazzite over Silverblue/Kinoite can make sense so that you can have RPM steam and also not deal with the Nvidia driver hassle on immutable distros, but the advantages of using Bluefin is a bit unclear.

I wonder why not switch to a RHEL clone like Alma which still complies for v2.

Edit: nevermind. I realize they still want v1 hardware, I thought this could have been about RHEL10 even removing support for v2.

No but no real implications for gaming, right? IIRC VKD3D and VKD3D-proton differ quite a bit these days.