There were apps out there to help with this when I switched from Spotify to Tidal. I can't remember the name anymore though. It just sucks up all your saved songs and playlists, matches them in the other service then adds them. Almost everything I had moved over without a problem. I do miss the social aspect of Spotify, being able to share links with friends. No one I know has tidal except the people on my family plan. There are services that will turn your song link into a linktree like page with links for Spotify, tidal, YouTube music, deezer, etc., but that's clunky.