I have a couple of RPi with Hifiberry hats that I used to input into Unitiqutes. I was happy with them as a lockdown project; but then I cracked LMS2UPNP, an elegant software solution that identifies all my Naim units. I have yet to find another yes for the RPi, although I have plans to Roonify an old Quad system.
The LMS2UPNP software runs on my MacMini; it needs some under the bonnet tinkering, but I don’t mind that. And it’s free.
There’s a thread that walks you thru’ the process: HowTo: Roonify non-Roon streamers (lms-to-uPnP)