Not sure if this has been discussed before: there seem to be important differences between using Tidal via WiiM app and Tidal app. First of all, not only the volume level on Tidal app is higher (pre-gain and everything else equal), but also the quality seems better, more refined, more dynamic.
On top of that, I did a search for the same artist on the WiiM app (browsing Tidal) and repeated on Tidal app. Once clicked on the artist, Tidal app returned more results on the number of albums and info. I thought WiiM was sort of "mirroring" the other apps.
I have not tried the same search with other artists, to see if it's a common thing, or if that was just a glitch.