Took me awhile to figure this out, so I thought I’d post the solution.
The Problem: I could not see Tidal’s My Daily Discovery in Roon. The reason for this is that My Daily Discovery isn’t a playlist, so you can’t see it in Roon.
Here’s how to see My Daily Discovery in Roon:
In Tidal, make My Daily Discovery into a Tidal Playlist (“add to playlist, make new playlist”)
In Tidal, mark the playlist created above as a Favorite
Eventually the playlist will show up in the list of Roon playlists that you have created.This may take a few minutes, or a few hours.
In the Tidal App. No it won’t autoupdate. You can force a sync from settings/services on the Tidal section rather than wait for Roons next auto sync which is every hour or so.