Since a few pipewire updates ago I get this journalctl error:
user pipewire[873]: pw.module: No module "libpipewire-module-x11-bell" was found
I had the exact same error on my Arch installation and it was solved simply by installing pipewire-module-x11-bell from the official repos. Although I haven't experienced sound issues nor do I use this "bell", it would be nice to have this package available on Solus, even if just to make the error go away.