1. Yes. The backport was for 5.15 jammy kernels including HWE derivatives. The user space SRU was done in bug
https://bugs.launchpad.net/ubuntu/+source/apparmor/+bug/1994146
which included Focal. The intent being Focal will only support mqueue if it is using and HWE kernel.
2. Yes that makes sense. I have added a linux-hwe entry for focal
1. Yes. The backport was for 5.15 jammy kernels including HWE derivatives. The user space SRU was done in bug
https:/ /bugs.launchpad .net/ubuntu/ +source/ apparmor/ +bug/1994146
which included Focal. The intent being Focal will only support mqueue if it is using and HWE kernel.
2. Yes that makes sense. I have added a linux-hwe entry for focal