Reportedly they're after Evenepoel. Won't be for next year though.Also doubtful if Red Bull goes once more all in on Roglic or rather tries to sign a younger leader, they can work with for many years. Ayuso, for example (although personally I doubt he has, what it takes to win a Tour).
I think like you see with UAE it doesn't suffice to just throw a lot of money at it though. You also need to have some sort of plan and a structure. This Tour their strategy was non-existent.