If you want to “grow with this team and org” as you say, then you better figure out how to get along with your boss, especially since they have alot of influence as you say.
What kind of opportunities are you trying to find, what does that even mean? That sounds like you’re looking for other jobs? That’s probably why new boss is feeling guarded with you, they don’t trust you. Why should they?
You need to be open yourself and build a genuine positive relationship with your new boss, and they will start opening up to you. But you have to do the work.