You can use commercial VPN services, like AirVPN, that offer port forwarding.
Setting them up is pretty trivial — e.g. with wireguard you can use wg-quick with the connection profile AirVPN generates for you (you would need to remove MTU and DNS specification from there, and adjust AllowedIPs if you don’t want full tunnel, but otherwise they are quite usable as-is).
Pick endpoint that has the fewest neighbour nodes, as reported here Neighbors, because nodes in the same /24 subnet share the ingress allocation.
The downside is — the throughput of such services usually limited to few tens of megabits per second, with rare exceptions.