I see a number of people who ask basically the same question. With the myriad of updates we’ve gotten, the dev team at Sonos can’t figure out how to add a sort option to the playlists? This seems so plebian and basic, it’s difficult to understand why it still hasn’t been done. Leads me to believe they give us this “community” and then pay zero attention to it.
Oh, and yesterday I tried to search within my playlist for a song and it went out into Apple Music and wasn’t even remotely what I wanted to do. I wonder if anyone on the Sonos dev team actually uses the app?