Nothing to be done, yet, just sticking this here to track it. lspci in TrueNAS Core 12.0 Beta 1 no longer pulls names, just ids. ixSystems may not fix this, as they see it as really low priority. https://jira.ixsystems.com/browse/NAS-106710
Arguably Plex only works if DNS is set up, so we could lspci -q. Maybe even lspci -qm for that saner output.
Alternatively, do the detection with pciconf -lv, but that's multi-line and not as friendly to parse. Not too bad though - look for @pci, then parse the lines until the next @pci for vendor and device and class display. If we can stick with the naïve lspci parsing, though, I'd prefer it. Why complicate what doesn't need to be complicated.