That would imply en existence of display/usb outputs…
We’re essentially talking a bunch of embedded devices talking to each other. You can give them all the dns entries you want, but if they (or the programming environment) don’t support DNS lookup you might as well put your dns server in excel.
I’ve worked in esports for a bit and there’s definitely cheats out there that pros use. When utilised well you won’t even notice when directly spectating or when the player is streaming. They’re designed to help extremely good players just that little bit extra needed to become a top-tier player.
Those “pro-grade” cheats don’t come cheap though. I’ve heard figures in the 400-600/month range multiple times. These would also work on the special tournament clients used by professional players.