Ron Howard revealed a couple years back that when George Lucas was originally working on the prequel trilogy, he wasn’t necessarily looking to direct them himself.
He wasn’t so much offered the movie as he was offered the option to consider it, but it never went beyond that.
He had apparently spoken with both Steven Spielberg and Robert Zemeckis before broaching the topic with Howard.
Even if Ron Howard had expressed some interest, it’s possible it would never have happened, as he then would have had to actually read a script and consider the situation.