Hey @Rene_, welcome to the Community.
Hope you're doing great!
Unfortuanately there's no way to recover them from your device, since that playlist get's updated so the files it has already downloaded which get replaced by the new content.
However, you can request a copy of your data in your Spotify account page, which might contation what you're looking for but I can't guarantee that.
Hope it helps 🙂
Help others find this answer and click "Accept as Solution".
If you appreciate my answer, maybe give me a Like.
Note: I'm not a Spotify employee.