luxi@endeavouros ~ > sudo systemctl --user status pipewire.service
Failed to connect to bus: No medium found.
luxi@endeavouros ~ > systemctl --user status pipewire.service
● pipewire.service - PipeWire Multimedia Service
Loaded: loaded (/usr/lib/systemd/user/pipewire.service; disabled; preset: enabled)
Active: active (running) since Sun 2023-01-15 22:49:39 CET; 57s ago
TriggeredBy: ● pipewire.socket
Main PID: 1719 (pipewire)
Tasks: 3 (limit: 18302)
jan 15 22:49:39 endeavouros systemd: Started PipeWire Multimedia Service.
jan 15 22:49:39 endeavouros pipewire: mod.rt: Can't find org.freedesktop.portal.Desktop. Is xdg-desktop-portal running?
jan 15 22:49:39 endeavouros pipewire: mod.rt: found session bus but no portal
jan 15 22:49:40 endeavouros pipewire: [0:00:29.789755852]  INFO Camera camera_manager.cpp:299 libcamera v0.0.3
So I tried things that seem to work, though, I would prefer not to use it.
After boot, one of the screens isn’t working, so I change Optimus to “Integrated” (“Nvidia” works too I think), log back in, and it works, though, it falls back to the “Hybrid” mode.