There’s always Bazzite’s vanilla KDE cousin, Aurora: https://getaurora.dev/ It is essentially the Fedora KDE spin with way better hardware support and QoL features.
But Bazzite isn’t really a distro in it’s own right anyway, it’s an unofficial Fedora spin that gets updates pretty much immediately (<24hrs) from upstream. It kind of “solves” a lot of the issues with most gaming distros.
I’d highly recommend both to new users as well, as they are immutable (like the Fedora Atomic Desktops) and make it a lot harder to completely mess up your install while you’re still learning.
Bazzite is exclusively KDE, and I honestly don’t think it’s possible to run a different desktop manager on it.
Edit: Sorry, my mistake, there’s the option for GNOME as well. But I don’t think they recommend even switching between them on an install.