I kind of dropped out of Linux audiosome time ago. Can I ask why both pipewire and jack? I thought pipewire was supposed to implement most (all?) the stuff that jackd does.
To use PipeWire in place of JACK, you have to install a specific package (`pipewire-jack` on Arch Linux) and run all of your audio applications using a wrapper command called `pw-jack`. You can update the `.desktop` entries for audio software on your system to automatically run this command; I've done that and everything I use launches correctly, tbh I forget that PipeWire is there. I just use Bitwig, qjackctl, Catia, etc. and they all think they're using JACK but really everything is being handled by PipeWire. Pretty kewl and it's been working perfectly for me for quite some time. :)