"While at Princeton, Bezos attended O’Neill’s seminars and ran the campus chapter of “Students for the Exploration and Development of Space.” Through Blue Origin, which he has called his “most important work,” Bezos is developing detailed plans to realize O’Neill’s vision." - [0]

[0] https://www.princeton.edu/news/2021/04/16/documentary-featur...

Elon was probably more invested earlier and was paying more attention to what was going on is for sure though. Im not convinced Bezos personal attention is going to do much to help his space company though. Nothing about him seems like it would help other than his wealth. And he hasnt shown a willingness to throw a significant part of his fortune into his space venture. Nothing about this strikes me as anything more than what is a hobby that one of the richest persons in the world is passionate about