Hi Mikki,
Yes, it seems that you are on 'B2 Sep 20 2021' which is a release of B2 version.
So, to get connected to Spotify, you will need to move onto the 'B2B' version.
Two ways to do thos are (1) purchase a new (micro)SD card from the Brennan Webstore, cost £10 inc postage, and will be preprogrammed with 'B2B' software.
or (2) download the B2B software and a program called 'balenaEtcher' from the Brennan Website (both free downloads), then follow the instructions on the link below to re-flash your existing (micro)SD card with the B2B sofware. You will find the downloads and instructions on this link.
Scroll down to the article 'New SD Card' for all of the information and downloads.
Regards,
Peter.