Connect T-Mobile 5G Hotspot to TP-Link Deco Mesh Wifi system (Deco X60)

I have tried to connect a cable via the USB-C to connect to ethernet on the Deco X60.  It doesn't seem to recognize it.  The cable is a Belkin USB-C to Ethernet.  I'm thinking of switching to the Mifi X Pro (M3000) which has the Ethernet Port built in.  Can anyone help me with this setup?  We currently have Satellite for internet and have found we get a better signal with the Hotspot.  I would like to get rid of the Satellite internet and use the Hotspot permanently.  When I plug in the cable to the Hotspot it says I'm charging the system….  Is there something in the settings I need to change on the Hotspot to have the Deco see it?  Thanks in advance for the help!