When you join a company, nobody tells you how it works.
I mean how it really works.
There is a public org chart which everyone sees.
But there is a private org chart which each person discovers in their own way.
So rather than trying to figure it out on your own, why not find someone who knows how things really work and ask them directly?
Or better yet.
Ask 5 people and then compare their responses.
This will give you a very good idea of how things actually happen.