Tldr; the "not supported" message specifically on 5.19 is not a bug, we have introduced more kernel releases (HWE kernels from interim releases) into Ubuntu and will soon extend Livepatch support to accommodate for this.
Tldr; the "not supported" message specifically on 5.19 is not a bug, we have introduced more kernel releases (HWE kernels from interim releases) into Ubuntu and will soon extend Livepatch support to accommodate for this.