@plemans is correct. There are any number of WiFi extenders which have an Ethernet port on them.
So the connection is: Orbi router ->to->Orbi satellite->to->WiFi extender (@5G)->to computer with Ethernet cable.
For this application, the WiFi extender has only the one WiFi link in operation (I actually disable the "user side" of the extender so there is no competition for WiFi bandwidth.)
My experience has been with WiFi extenders by Netgear and TP-Link. (Have a TP-Link RE220 coming from Amazon tomorrow. When gizmos cost less than $25, I often buy one to see how it works.)
