As far as I'm aware, none of the music services really have a direct transfer option available. You pretty much have to use a third party service to do so from what I found the last time I tried to do a major switch.

Funnily enough, I feel like this is one of those things that are present day "AI" could probably help with, if it were integrated with these services. Realistically you'd just need something to do some OCR of images from your playlists, and match the results - I'm kind of surprised that's not something Spotify, Google, etc have done yet.