I just realized you can actually see Obi-Wan stow away on Padme's ship before going to Mustafar : r/StarWars
Amazon.com: Star Wars Mission Fleet Stellar Class OBI-Wan Kenobi Jedi Starfighter Starfighter Run 2.5-Inch-Scale Figure and Vehicle, Toys for Kids Ages 4 and Up : Toys & Games
Amazon.com: Hasbro Star Wars Starfighter Vehicle E3 Ve02 OBI-Wan Kenobi Starfighter : Toys & Games
Star Wars Mission Fleet Stellar Class Obi-Wan Kenobi Jedi Starfighter