We have plenty of game servers behind us. See Cloudflare Spectrum: https://developers.cloudflare.com/spectrum/
I proxy through Fly.io or AWS Global Accelerator when I can’t use Cloudflare for TCP as a hobbyist.
(Why only three protocols and such strict limits, years after launching? You won’t cannibalize Spectrum by allowing more hobbyists to use it, you’ll market it for use at scale - like Argo Tunnel’s trycloudflare)