Ethernet Supported Antenna / Tuner

If I can ask a clarifying question, does this mean that as long as the tuner is connected to a network access point It doesn’t need to be directly connected to the computer running Plex server?

I tried one of the recommended loop antennas and it’s only getting a handful of channels. Now I’m thinking I could get a more robust outdoor antenna and just make sure there that it’s mounted somewhere I can reasonably setup the tuner and an access point from my eero mesh.