This morning I updated my Fedora 36 computer and suddenly it could no longer find any sound devices. Thanks to a Fedora user who commented on this reddit thread, I found that the solution was to downgrade my Pipewire packages. Specifically, at this point in time:
sudo dnf install pipewire-pulseaudio-0.3.49-1.fc36
A reboot didn’t make it work on its own. So I had to do the following afterwards:
systemctl --user restart pipewire-pulse.service
And I got my sound back. Huzzah!