problem with excluding the kernel package from updating is that you won’t know if a newer kernel would fix the potential regression that you are experiencing.
so rather than excluding kernel from updates, I would increase the number of kernels the system keeps available for booting (to 6 or 7 or whatever disk space is available on /boot).
This makes booting older kernels very easy and you don’t have to entirely role back your system (using a Timeshift snapshot or other complicated stuff).
sudo dnf history list, sudo dnf history info <id>, sudo dnf history undo , sudo dnf history redo, … are probably commands you may also want to know.
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