No worries, my android app has always worked pretty well. I think the Pixel 7 is in need of an update as the current playing media (and controls) don’t display on lock screen - they are only visible when you pull down the top phone controls.
a “recently added” functionality for local music library
song lyrics
multi-user ability; for example different users to be able to access the same volumio machine and each one to play at the same time his own songs on different speaker (e.g. one using Pi USB, another local playback and another to cast to another device) while each one to be able to have his own favourites, etc.