Emphatically YES. I know this from personal experience, and from watching close to a hundred clients transform their lives.
Charisma is not like eye color. The idea that you are either born with it or you’re not is a destructive myth created by people who want to justify their own deficiencies. Charisma is a skill.
No different than playing the guitar or riding a bike, charisma can be learned. The biggest difference is how little time it takes to become great at it.