Often leaders have the best intentions, but people cannot read their minds. That's why it's important to declare yourself: Tell people why you choose to lead and the code you live by.
All of us introverts aspire to be more outgoing, but it's not in our nature. When I was nearly 50, I discovered that the best thing to do was to tell everyone I worked with that I'm just shy. People are not mind readers - you need to let them know.
Extroverts may get places faster, but for introverts it's all about working at the pace you need and, at the end of the day, performing at your best.