I think lots of people get into it after years in the industry as djs, music journalists, playlisters, etc…people get tapped by projects or companies that are looking for their particular taste and categorical knowledge of music.
If you’re a natural crate digger, playlist maker, connecter-of-dots— it may be a path you can carve out for yourself by making a name for yourself as a trusted source in the industry and networking.
Anyway, lots of good interviews, podcasts, and articles featuring supervisors discussing this sort of stuff. Warning: like a&r work, it ain’t all fun …mostly contracts and paper pushing.