Personally, I don’t trust Jack, I’ve never trusted Jack, and trying to get PipeWire to emulate Jack is not something I’d ever even attempt. I can say definitively that it works very well without Jack, using the PulseAudio / ALSA emulation layers in PipeWire. (Though I can’t comment on latency or other audio-nerd aspects.)
See the Ubuntu-24.04-in-a-VM results I just posted. And that was for recording from the emulated PulseAudio device, even.