Swapping bluetoooth left and right channels with wireplumber/pipewire

[magill]

Is it possible to swap bluetooth speakers stereo channels with wireplumber?
I know it's easily done in .config/wireplumber/main.lua.d/50-alsa-config.lua for USB devices, and Easyeffects can do it for any device, but can this be done with bluetooth? Unfortunately wireplumber bluetooth configs don't seem to have that setting. And Easyeffects introduce audio/video sync issues that can't be addressed with pavucontrol, for some reason, even though sync offset settings work when Easyeffects aren't running.