Ok, so I'm the rare person who regularly uses both Spotify and YTM. I have used a variety of tools to transfer and sync playlists across the 2 services—Houdini and Soundiiz primarily. Source: about 1 year ago

For what it's worth, you can port playlists from Apple Music to Spotify with SongShift and keep them there as backups! Source: 6 months ago

SongShift will match up your libraries so you don't loose anything https://songshift.com/. - Source: Hacker News / 11 months ago

However, Spotify's recommendations and search are FAR superior. When I switched to Apple Music (at the time, I'd just gotten an Apple Watch and Spotify didn't allow downloading music directly onto the watch. It's still buggy and not intuitive). So I used SongShift to transfer over and create all my playlists. That worked great. Now, a few years later, I still listen to all my Music on Apple Music, but when I want... Source: 11 months ago

There are a ton of transfer services out there, SongShift is one, FreeYourMusic is another, they aren’t perfect but will get you 90% of the way there. Source: about 1 year ago

Https://songshift.com use this for transfer, free and has all features you need hopefully. There are others but they are paid or have limits. Source: over 1 year ago