I did a quick search. Names were named by him here [1] in 2024 - but not as successors per se. More like candidates for important roles in the future. This [2] interview from 2020 touches the subject as well.
I interpret it in a way that he tries to cultivate an environment where a good leader/successor/main-whatever emerges somewhat naturally.
(Prime example of my personal behavior which I really don't like: Put a half-baked assumption/hearsay on the internet. Get 2 replies. Start actually researching the topic only afterwards.)
