I can confirm that he did come out today at 10:15. Trying to get a photo is a nightmare. I love to see the characters roaming, but I wish there was a better and more orderly way to do pictures. Maybe have him roaming during the day and then have a proper Meet and Greet in Launch Bay at night.
Or just have both at the same time. It wouldn't break the immersion if Mando is out & about in GE & then having a Meet and Greet on the other side of the park lol