Lucas also explained a Han Solo reaction that made it into Solo: A Star Wars Story, according to Ron Howard, who even noted the A New Hope director got into the character of Han Solo while explaining how he felt the character would behave!
Jon Favreau is by no means the only person associated with Star Wars who has taken a meeting with George Lucas in the past.
J.J. Abrams has already admitted he consulted with Lucas for Star Wars: The Rise of Skywalker, although he was a bit cagier about what he took out of the meeting.