I was looking something simple to connect OBS 27 with Spotify and I found it here! I recommend this pluging because it works with the PC version of Spotify. Simply run it, login in Spotify, Capture Windows in OBS and thats all!
This is one of the only (and my favorite) working Spotify widgets that I've found. Set up is extremely simple, you just extract it from the .zip, open the application, connect your Spotify account, and then use "Window Capture" in OBS to add it to your stream overlay. The only issue I've found is that with longer song titles the text occasionally clips a bit, but this isn't a big problem and I'm sure it will be fixed eventually anyway. I absolutely recommend this.