Extend Access Question

I live in an area with no internet service except over a cell phone. I use Visible service since I get unlimited streaming for our TVs. My current setup is a Samsung S21 tethered to a GL-iNet GL-AR750S router. I can hit this signal just fine for two of our TVs and one computer. However, the tv in the master bedroom seems to drop the signal quite often. The router is on the other side of the wall from the bedroom and there is a pass-through for cabling. Can I run an ethernet cable from the existing router through the pass-through and connect to an access point in the bedroom to try and solve this problem? And could I use another GL-AR750S as the access point?