Off topic slightly but for music VLC for Android is even better compared to its desktop sibling for the same purpose.
I mean VLC for desktop will play anything and I dont deny how powerfull it is but afaik:
it doesnt rescan automaticaly for added and removed music like a watchfolder.
No native dark mode yet, yes a ton of dark mode themes, but they all are geared to video and lacking the medialibrary with album browsing.