gba emulator like myboy linking help!(Multiplayer over Internet)

[spicyblue]

1.there is a app extension called Remote linking for myboy it works but high latency but it works
2.multi gba s has over the internet works but it has ugly interface and i dont like everything about it
3.Zerotier doesnt work on myboy
4.my router cant do port forward and has strict NAT type and cant access upnp coz i need to pay
5.there are vpn but i need to pay to be able to multiplayer like nordvpn and private inter access

please if you have any other options on how i will be able to online multiplayer for myboy emulator ill appreciate it