Not available for everybody.
> As of today, daylist is available to both Free and Premium users across the U.S., Canada, the U.K., Australia, New Zealand, and Ireland at spotify.com/daylist.
https://newsroom.spotify.com/2023-09-12/ever-changing-playli...
(note: old post, but still accurate?)
I’m in Southeast Asia, daylist has been around for years in my side of the world.