T mobile home internet tmo-g4se

I'm trying to enable upnp so that i can do basically any sort of party chat video gaming on xbox or party chat via discord etc. cant use my Nintendo switch to do any peer to peer network gaming as upnp is not enabled even tho nat says moderate. any time i try to connect it either works for a second and drops out or says NAT traversal error. dont know of any way to manage the tmo-g4se but a upnp option or nat option would be amazing as at this point the internet is worthless other then strictly server gaming or streaming. cant play with my buddies in voice chat etc. if there is anyway to manage the tmo-g4se I would appreciate knowing how to.