Can you provide a bit more details to your setup (HE, …) - it sounds perfect and exactly what I am looking for at the moment.
For the pipewire / pulseaudio channel mapping I can go into the boring details if you want
Oh, and I plug a Logitech Bluetooth audio receiver into the line-in on the USB 7.1 soundcard, so I can pay music from a phone or my HiBy R2 DAP.
About the Pi: it sucked for a heap of reasons. I found myself fighting stupid battles over and over. Switching to an x86 made all of those problems disappear immediately. Stay the hell away from the Pi, is my advice.
I don't have a remote actually, I use the Kodi Android remote, MusicBee Android remote and kdeconnect (for everything else).