Yes ageism suck, yes radio 1 suck for being anti women over 40, yes it would be nice if they changed. But in 2023 it is such a non issue. Kylie has managed to hit #12 in the charts, be introduced to a whole new generation of people and has seen a huge boost in her streaming presence. All of which would have happened with or without Radio 1. The fact she's done so well is proof of how little it matters.
It's not 2010 where being playlisted on Radio 1 was of the upmost importance and where their misogyny and ageism were at it's peak. The power of Radio 1 is so minimal, nobody really cares who they do or don't play. They are stuck in their ways and won't change even if they lose listeners, which they are. And even if Kylie made the playlist, it would be of little consequence anyway as the same people who listen to it would already know it from playlists on streaming.