I've started compiling a playlist of what I'm calling "undiscovered indie" on Youtube. My criteria is broadly anything with a low play count that I enjoy. It's fun putting it together and I'm finding some fantastic music that appears to be relatively unknown.
I'm doing this on Youtube rather than Spotify simply because Youtube and Youtube Music are what I use to listen to music most of the time.
You can find the playlist here https://youtube.com/playlist?list=PLrVp17ZyaQSGmlGqLsBl0Z12jrbRVj-h8&si=y9lckgcNtPml51RN