Alas, we never did learn how Han got his black vest; I guess that was being saved for Solo 2.
Solo even goes out of its way to explain how Han got his last name, which was a questionable decision.
Going into Solo: A Star Wars Story, we knew that certain elements of Han Solo’s past teased in the Original Trilogy were going to be shown, such as how he met Chewbacca and Lando Calrissian, as well as how he obtained the Millennium Falcon.
Sure enough, Solo delivered all that, but as this Honest Trailer notes, the movie feels like less of a character study and more of a “feature length adaptation of Han Solo’s Wookieepedia page” that reveals the “fascinating” origins of his accessories, like his DL-44 blaster, the reason the Millennium Falcon has a forked appearance, his “signature” catchphrase (“I know) and his dice, which didn’t even become a big deal until The Last Jedi.