In 10 years of using Fedora (granted: my current main Linux system is SteamOS but I do have hardware running Fedora as well but with Gnome as desktop in that case) I once had a kernel-related bug, IIRC involving some fairly new AMD hardware.
KDE is currently unstable again (while it worked perfectly on Plasma 6.0)
Unless you’d be so kind to point me to a direction that showed that your instability is because of Fedora and not some bug that suck into Plasma 6.1, you’d have the same bug under any other distribution with Plasma 6.1.