Hey there @JakobValeur,
If you can't find the instrumental song versions by Vi sidder bare her it's possible these releases aren't currently available in your region. Availability of content can vary over time and between countries, depending on agreements between Spotify and rights holders, such as artists or record labels.
However, we add new content to Spotify every day, so if you can’t find the tracks right now, they may appear soon. Alternatively, you can always contact the artist or record label with your query or make use of the local files feature.
Hope this helps. Let us know if you have any questions.