I think the answer to this Question (actually not a Feature Request) is already given by Roon.
You get line art for devices known and supported by Roon and their partners according to their Partner Devices Matrix. For Squeezebox support you end up with:
| Vendor | Model | In-House | Max Format | Notes |
|---|---|---|---|---|
| Logitech | Squeezebox 3 | Yes | 24/48 | |
| Logitech | Sqeezebox Radio | Yes | 24/48 | |
| Logitech | Squeezebox Boom | Yes | 24/48 | |
| Logitech | Squeezebox Transporter | No | 24/96 | |
| Logitech | Squeezebox Duet | No | 24/48 | |
| Logitech | Squeezebox Touch | Yes | 24/96 | |
| Logitech | Squeezebox Touch+EDO | Yes | 24/192 | |
| DSD64ยน | Requires 7.8.x firmware and EDO plugin, only for S/PDIF output |
And from here:
Squeezelite/Software endpoints
Roon does not support software implementations of squeezebox endpoints, and we do not test with them as part of our QA process. If you attempt to do this, you are on your own.