That happened a while ago though.
The announcement happend years ago but the contractual relationship is still ongoing until the end of this year.
He was given the chance to drive the impossible second seat and failed like everyone else.
Realistically he would have needed to do an absolutely outstanding job for Red Bull to not fire him. He's only in that seat because Honda is paying for it. Same with reserve driver Iwasa.
Red bull is not interested in any Honda agents in their factory after Honda decided that they like being paid by Aston Martin more.