Where are these worlds? Because you are at the same time too active with too many forces and playing in the different power games and too inactive to let the Successor States or ComStar not looking for you.
How come they didn't follow General Kerensky in Exodus?
First of all I am adding two images that I converted to a usable format I hope. This shows the exiled hegemony circa 2821 and 3058. ComStar couldn't find them because they were never included in the HPG network or were removed from it. Com Star has a lot of back doors into their systems thanks to the Hegemony controlling the Star League Intelligence organizations following the Exodus. Read "Into the Shadow's" for a prequal to the storyline.
They did not leave with Kerensky because these people were not part of the Star League Defense Forces and like a lot of the Hegemony Militia's remained behind if they survived. They did not reveal themselves to Richard Cameron following Simon's death due to the influence of Stephan Amaris. They waited and when the war kicked off they supported Kerensky.
As the stories move on you see the Hegemony-in-Exile isn't as strong as they appear. Technology is quickly matched or exceeded, the Word of Blake will succeed in devastated the Armed Forces and bringing them down to manageable size and they will have to fall back from Terra and much of the Sarna March.