I have looked at Fedora jam, my issue with it is the same issue I currently have with no way to use yabridge that I could find though this may have chnaged since i last looked.
AV linux does look promising, just haven’t deep dived on it yet. My concern was that its done by a single dev iirc but again i haven’t done a deep dive quite yet.
And also a huge fan of reaper. Been using it for years now and I love it so very solid recommendations. I appreciate it. :)