From what I can tell that router is a mobile broadband router. Generally even if the router had port forwarding options it still would not work. Most mobile broadband ISP most times do not give you a public ip address. They are doing what is called carrier NAT on one of their routers. The port forwarding would need to be done on that router which obviously you can't.
Since this appears to be some bundled router it is unlikely you can replace it.....not that it matters if you can not get a public IP from the ISP.
You have few option other than kinda extreme ones. You could get a vpn service that gives you a fixed IP address. I know nordvpn had that option, I think they charge like $5 extra/month on top of the normal vpn fees. The maybe a better VPN service where you live. This will work for anything you can run the vpn client on since the machine itself gets this public IP address. If you have mulitple device or something that can not run a vpn client it gets more complex because you would need to put a second router behind the ISP router.