Wireless Joint

I would like to Usb tether a Galaxy A51 phone to a GL-AR750 and place under a covered outdoor porch, The reason being is the phone gets 80+mbps in this location and inside i get 14mbps or less over a Cell Repeater, Then I would Cat6 cable from GL-AR750 to a Ubiquiti LocoM5 in repeater mode or use a Google mesh router system located inside the home to broadcast, home is 110 feet long with porch on one end and bedroom at the far end where most internet activity would take place mostly streaming, Would A GL-AR750 be the proper hardware for tethering in this situation or is there better hardware ? Data plan will use a 3rd line postpaid using At&t 100gig elite unlimited, The goal is to spread home internet over 2 systems on being a Mofi already setup as my main Wifi, Then a second redundant system, I'm open to Ideas.