If you use picoreplayer you can do this and use Rooms squeezebox connection. I have 2 pi’s setup this way one with digi+ and one with amp+. Works ok, you get now playing with artwork and even the vu meters that squeezebox had. It’s fiddly to initially setup but once done its a good stop gap until they have Roon remote on pi.
Yep both Hifiberry boards. Using the pimoroni stand for the amp build and the official rs one for the digi +. The pimoroni should be avoided as a stand though as it does not support it very well and the plastic screen had started to slip as the adhesive they use is not great. The RS one offer much better support for the entire screen frame.
I have the 7 in. Raspberry Pi screen with Picoreplayer and Jivelite on a Pimoroni stand. I currently use it with LMS that is installed on the PiCoreplayer. Though it can work well as a Roon Endpoint I have decided to use my Squeezebox Touch for Roon Endpoint duties. I can now switch easily between the two servers when I need to.
The Raspberry Pi 3 attaches to the screen and the Iqaudio Dac+ attaches to the Pi. No problems. I use a split power cable adapter to power the screen and Pi from the main power source. Works well. You can add a back plate to tidy up the rear if you wish but I’m not bothered about what’s behind as I can only see the wonderful screen and it’s images. I do intend to make an enclosure and attach the screen in a similar way to the Audiophonics player but I need some spare time to work on this. I’ll try to post a picture in due course.