Go to an artist page or "Global Top 50" and try that.
As I said, I never figured why they removed it or disabled it on certain places.
Because the desktop app got a ground-up rewrite and cmd-f didn't make it back in to all views yet.
I know how the engineers must have felt, I bet they wanted more time to make it more modular so they could have just gone
self.addComponent(new Filterable()) or some shit and it would have added Cmd/Ctrl-F
Didn't realize Ctrl-F was ever a thing in Spotify. But I just tried it and it works for me (MacBook Pro). I'll be trying that out more now.