adb – How to Port Forward Android Phone used as a router? (No mobile data, Wifi connection to device and usb tether to pc)


Ok so i would like to ask how to port forward an android i currently use to access internet on my pc by using it as router (Note: Android has no cellular sim and hence it is not mobile data rather i am using wifi to get network access on phone and then using usb tethering to get network access on pc) . I have forwarded ports from source router (main router) but android is not allowing me to forward ports… My phone is rooted too… Is there something i can do to forward tcp/udp ports 28965 from my andoroid (working as a router) to my pc (server host)… I am making a game server…

Can i use ADB Shell to forward ports… Pls guide me i am a noob in this… Replies will be highly appreciated.