I saw something great in some Seth Godin piece. If your boss (or team) doesn't yet trust you to do big, impactful things, take on other projects to earn their trust. The breakthrough idea was that they don't have to be product projects. Just organizing lunch, a team build, software purchase, etc. can be enough. As a coder, those seem trivial but to a non-coder they're just as big and important a task.