You might wanna read that:
https://www.reddit.com/r/openSUSE/comments/pwxs3i/btf_file_not_generated_because_vmlinux_could_not/?...
Long story short:
They changed the location of the file 'vmlinux.xz'
try
ln -sf /usr/lib/modules/$(uname -r)/vmlinux.xz /boot/
https://askubuntu.com/questions/1348250/skipping-btf-generation-xxx-due-to-unavailability-of-vmlinux...
