Vega11 is not listed explicitly in the dropdown on the website. But AMD lists it with their "newer" cards so I choose that option.
Quote from AMD: Download Linux® drivers below for AMD Radeon™ graphics cards, including AMD Radeon™ RX 9000 Series, AMD Radeon™ RX 7000 Series, AMD Radeon™ RX 6000 Series, AMD Radeon™ RX 5000 Series, AMD Radeon™ RX Vega Series, Radeon™ RX 500 Series, and Radeon™ RX 400 Series. according to: https://www.amd.com/en/support/download/linux-drivers.html
So that should be the correct choice, right? Or is Vega just not supported by Bazzite at all?
I also thought there was some issues with the first and second gen of Ryzen CPU integrated graphics and linux support. But I could not find any reference to that at all anymore. So I guess that's not the case, no longer the case?