I've got an older version of that-
This guy Are you doing a proxmox dealy and running the router in a vm with a passthrough nic? I half ass started to run pfsense in a vm on my server which is running truenas core, but my brain started hurting about cabling, and passing through the nic was a bit squirrely when i tried last. I do want to get a 10g connection between my nas and main pc at somepoint, but that's a few nic purchases out.
Definitely have been eyeballing random sff machines for a pf or opnsense router box tho.