Be aware that as long there's no specific API for YouTube Music; we can only use the standard YouTube API here: https://developers.google.com/youtube
So the only thing we can do to add elements to YouTube Music is:
- Creating a YouTube playlist (which will then also be displayed on your YouTube Music interface)
- Like a YouTube video (which will then also be displayed in your "Liked Tracks" on your YouTube Music interface)
That means while moving favorites "Tracks" from a music platform to YouTube Music with Soundiiz, your songs will then be added to "Liked Tracks" on YouTube Music and not in your "Library Tracks" YouTube Music.