Comment 1 for bug 1996514

qjackctl is not an Ubuntu-specific package, but is synced from Debian without any modifications. Therefore, this is an upstream bug in Debian and needs to be reported there. Rather than split the package from the Debian version, it would be better to get it fixed in Debian and then have that synced to Ubuntu.

Additionally, in packaging, we can have it include two dependencies meeting the criteria rather than drop a dependency. In this case, it would read as follows:

Depends: jackd | jackd2 | pipewire-jack

However, knowing the upstream developer of qjackctl, he might disagree on the latter, in which case this bug would get marked invalid.

Information about reporting bugs to Debian can be found here: https://wiki.ubuntu.com/Debian/Bugs