Epson Printer will not connect to 5G gateway

I had the same problem with my Epson WF-7520.  However, I was reading a thread on a Cannon connection problem and they solved their problem by changing the Gateway 5G default WPA setting to WPA/WPA2.  That person's complete explanation is below.  Hope that helps someone else.

For my Pixma MG5420, I had to change the WPA version on the Tmobile gateway app (Network tab, select your wifi network, under WPA version, change to WPA/WPA2 from WPA2/WPA3).  Then on the printer, go to Device Settings ->LAN settings, ->wireless lan setup, ->Other setup options, ->Standard setup,->select access point, → Directly enter the access point name, then manually enter your wifi network and the passcode.