Is my manager a narc under cover?

Hii, so I started this new job 2 months ago and I already have some concerns about my manager and I feel my stress level going up day by day.

As an example, she told me to research a platform from where to collect relevant contacts, just that. So, I took it seriously I did my research, scheduled a meet with the representatives from the platform. My biggest concerns was the GDPR compliance. So I spoke with the ones with the platforms they explained everything and at their end everything was fine. Also, I was thinking we have an entire department in charge with the legal part so I spoke with them to confirm everything. Meanwhile I made updates to my manager on teams with everything I did (including that I plan to speak with someone from our legal department) and asked her to participate with me in one of the meetings to see what is it all about. SHE JUST LEFT ME ON SEEN FOR EVERY UPDATE OR QUESTION. So I had all the meetings and ofc after I updated her about all. And on teams she told me that is unprofessional to bother other colleagues and to make these kind of decisions without approval from her, that I understood everything wrong she just needed a price and some details about the features, I wasted my time, her time and my colleagues time.

She told me to have a meeting to explain me what I have to do things from now on.

In the meeting I was SPEECHLESS because she was just a totally different person. She started with: oh I appreciate so much your proactivity, you just remind me of how I was when I started here and I really took a liking on you. I see that you are the kind that give herself tasks I was exactly the same, but you don’t have to put on your shoulders everything.

AFTER THE MEET I WAS WHAT THE FUCK JUST HAPPEND? I felt like I spoke with 2 different persons. What is that?

Is it just me? I stress too much or this is just odd? Is she fake?