Possible to use JF on a mobile hotspot?

[4r5hw45twh]

So, I just moved into my partner's place. They don't have a traditional Internet provider, so we are using my Netgear Nighthawk MR1100 (unlocked) that I happened to have. A T-Mobile SIM is in it. Is it possible to connect to JF through it? Everything works fine locally on my PC but we like to use the projector, which is connected to their phone, which is connected to the WiFi network to play JF media. That's how we had it work at least. But now we only have this hotspot since I moved.

I assume I can't forward the port on the hotspot....or can I? Not sure how to proceed.