Wyze Mesh Router with T-Mobile Gateway internet

Wyze youtube videos make it look easy but I’ve only gotten 1 mesh router to work (I think) and it has to be connected with an ethernet cable. I won’t work wirelessly at all. I’ve almost given up. In the Wyze app it shows offline/online intermittently. Right now it shows online but if I leave it and come back to check it on the T-Lite app, it says offline at first and changes to online. Any suggestions to try ? I’m not good at modems and routers etc. The T-Mobile gateway is just a box that I plug in and connect to.

Any update? I’m thinking about getting the pro router and I’m on T-Mobile as well. I think you need to put the router in IPV6 passthrough mode.