The kernel version I used, 5.14.21-150400.24.21-default, is the most recent openSUSE Leap 15.4 kernel. I can retry with the SLE build of the kernel. As I understand it, I simply have to add the repository at https://download.opensuse.org/repositories/Kernel:/SLE15-SP4/pool and then switch packages, right? And just to make sure: From a legal perspective I am also allowed to use that package in my openSUSE installation, yes?