So I don’t have a DSJ but my integrated amp only took Ethernet so I tried the TP link AC1200. Awful, kept needing to be reset, just kept going wrong, over and over.
I found the best thing that would work wireless for me is the discontinued Sonos Bridge. You connect one at your router and connect one in whatever room you need Ethernet. This creates its own wireless subnetwork and it has never lost connection or needed to be reset. They are cheap on ebay now, I got one for 20 and one for 15. Really the best thing I could do in an old house until I got the nerve to start drilling holes outside to wire directly from my router. This does nothing to the file, so no difference to the Bridge whether it is High Res or not, it is just data at that point, no processing.
Pretty sure if you needed more than 2 Ethernet ports at the room with the DSJ you could add a switch.
Hope this helps, I spent a lot of money wasting my time with other tech.
Edit You don’t need any of the other Sonos stuff with this, just the bridges. I think it also gets rid of the need to turn off channel switching as one bridge is plugged into the router.