Just went through this as it triggered a concern I have about backing up things I’ve invested lots of time into.
First, I tried Soundiiz. The web indicates you can use it to create a CSV (comma separated value) or TXT file, among others. After creating a Soundiiz (free) account and connecting it to my Qobuz acct, I didn’t find any export options. The web indicated links didn’t exist in Soundiiz, in the free version at least.
So..Soundiiz got deleted. Next up was FreeYourMusic. Created an account, connected it to Qobuz and doing a backup into an Excel(.xlsx) file was pretty straight-forward. It’s my understanding that an Excel file can be used as a streaming service import format, using third-party apps like FreeYourMusic, Soundiiz..etc. If need be, you can convert an Excel file to a CSV(or TXT or others) file by using Excel, Save As.
Certainly, saving your playlists as a common format xlsx, csv, txt, etc. file will give you the security and transfer/import ability you’re after without costing a bundle.