I’ll share my experience with using a powerline adapter for streaming, in case it may be of any help…
I have a Modwright Sony streamer, which I’m quite happy with for my own music collection, but it doesn’t stream Tidal, which I really wanted (and now feel like I couldn’t live without). So I bought an Auralic Aries, but before using it I read lots of forum posts of folks complaining about their streaming software. So I bought an Elac Discovery streamer for $1K (and sold the Auralic) and I’m extremely happy with it. It has coax and Toslink digital outs (I use coax into a LKS 004 DAC or Exogal Comet), in addition to analog outs, and comes with a lifetime Roon Essentials subscription that stays with the unit—it can be used as a Roon endpoint as well, but I simply use the included Roon (limited to 30,000 tracks).
It requires a hardwired Ethernet connection, and my listening room is in a studio guest house separated from the main house, so I use a Netgear powerline adapter (from Netgear AC1750 router). Set up is simple and I’ve had no connection problems, and almost never get dropouts or have to reboot (I can’t remember the last time I did). The Elac is limited to 24/96. With Roon, my library on my external HD and Tidal library are synced perfectly. I use an iPad as the remote, that syncs with my router over wifi.
I was concerned about RFI/EMI riding on the powerline into the DAC, but the sound was very good. I found that changing to a Harmonic Tech Photon digital cable improved the sound slightly over the Analysis Plus cable I was using, but can’t say whether that’s from eliminating RFI, etc. or just that it’s a better cable. I had also considered using a glass Toslink into a WFS Remedy reclocker, but think all is well as-is. The combination of the powerline adapter and Elac streamer is one of the best things I’ve ever done to enhance my listening pleasure… good luck figuring out your situation …