When you are transferring artists to YouTube Music with Soundiiz, you will be able to retrieve them under "Subscriptions" tab on YouTube Music interface => https://music.youtube.com/library/subscriptions
Be sure to sort by "A-Z" to display them all.
What is the difference between the "Artists" tab on YT Music and the "Subscriptions" tab?
- Artists in the "Artists" tab are artists from your liked Albums, Tracks and Playlists
- Artists in the "Subscriptions" tab are artists you are following/subscribed to