For anyone interested:
https://www.cloudflare.com/en-gb/products/tunnel/
A Cloudflare tunnel is both an anti-DDOS solution and hiding the real location (via geolocate databases) of a server. It does nothing to solve issues of being unable to forward ports from your "server" on the LAN, nor solving issues of being behind a Proxy, NAT or Carrier Grade (CG) NAT of an ISP rather than you router/modem having a public IP.
The only viable solutions to CG-NAT (or other non-public IP on modem/router), or an ISP that won't let you forward ports, are either hosting or a co-located server.