I don't know better than any other people here, but that Kallman syndrome is not directly related with Body Odor . But it usually comes with loss of smell among other symptoms. This MAY in turn cause Body Odor (usually due to poor hygiene or other metabolismic mechanisms), I am just thinking loudly. We should first speak with a endocrinologist.
Specifically at your age you should prioritise it. I'm a bit old for other issues. I'm just trying to get the sense of BAD SMELL that makes others irritated.