Bazzite is based on Fedora, so the support base for using it would be large.
Edit: the Plasma version of Bazzite is called Aurora if I remember correctly.
Fedora itself also has a KDE Spin which I’ve been using for about two years, so I can recommend that as an easy option as well. I personally ran both Kubuntu and Neon (both Ubuntu based) but had major hardware compatibility issues with both so I can’t personally recommend either. I’ve heard they’re generally good though.
Sorry I just looked into it and Bazzite actually comes with KDE. I was thinking of another distro by the same organisation.