For the past few years Spotify’s Discover Weekly has been the main way I discover new (to me) music. Secondarily I guess just from browsing the related artists of the ones I already listen to. Looking for other strategies inside or outside of spotify.
I’ve tried both Spotify and Tidal and found them to be a bit lack luster on recommending new music. Youtube can be a bit more diverse. Although if you keep clicking on the same artist, it just recommends more and more of that artist. If I’m feeling adventurous, go to an artist’s bandcamp page and see what is recommended from there.