I used a 3rd-party app called "Tunemymusic" to transfer my album list and playlists from Spotify to Tidal. I ended up subscribing to "Tunemymusic" on their monthly basis, but cancelled it before it renewed the following month after I’d already done the "transfer". You can also export your album list and playlists to a text or .cvs (compatible with Excel) file.
I did this to have an electronic record of all my stuff on my computer. I also downloaded a list of all the "missings" tracks and albums too (stuff that wasn't available on Tidal). Soundiiz sounds similar. Worth it for peace of mind.