Trouble with connection to work VPN

I own the VPN I have end to end. I've used l2tp with IKEv2, blocked; wireguard worked for a day then blocked; openvpn worked for a day then blocked I even reconfigured it for different ports each would work until disconnected then blocked, I setup teleport that worked for a day then blocked.

The best I can tell, t-mobile doesn't want you using VPNs on their equipment, the best I can pin down is any device you have has to be NATed. Meaning if you have a cellular hotspot turn it on and then connect your device to that via tethering and then the VPN on the device will work; but if you have devices like a cellular laptop they will shut that VPN down. I don't know if this is because of voice enabled lines vs "hot spot" dedicated data only lines but my gut is telling me it has something to do with the plan for the sim being used. I've got no prof as I've not tried it on a "data only plan" yet but it's next on my list of things to try. Until then I'm having to tether a cellular enabled laptop(yes t-mobile those exist and you shouldn't ignore them) through the hotspot on my phone to get VPN access.
 

I hope this helps. I know for you whole home cellular users and remote users like my self it's just frustrating. I've been considering jumping ship for years and this might be just enough reason to finally do it.