They have SFU support as of recently, so it should scale similarly to Jitsi et al.
You would be well advised to use services where the traffic travels through https on port 443 on the server (because it's been my experience that it tends to get pretty good QOS favorability). My own little rule of thumb: "you can connect to any port you want, so long as it's port 443 https." ;)
Though tls/443 is usually still supported because it's most often allowed by even restrictive firewalls and networks
There's Galene, <https://galene.org>. It's easy to deploy, uses minimal server resources, and the server is pretty solid. The client interface is still a little awkward, though. (Full disclosure, I'm the main author.)