Best file-based music player for apple watch

Hi,
I will be getting an Apple Watch series 10 64 gb wi-fi only for Christmas this year. On my iPhone, I normally use evermusic pro to play my music, simply because syncing is such a pain in the neck. I don't think evermusic has apple watch support. So are there any folder-based music players for apple watch? Preferrably ones that have crossfade support, and eq. Or can I add music to an apple watch with iMazing and use the native music app? I think that gained crossfade support.
Thanks for any ideas.