Nevertheless, yes it's very similar to my experience of bigger corporations.
First of all, you should understand your local political landscape, find allies, build your network and trade favors.
Second, things are going to take longer, there is no workaround for this. Wait until you discover you need approval from the security or ops teams for your app, you'll understand what I mean.
Then, you should also understand that you won't be able to get access to things and ship patches in projects on which you don't have responsibilities. That's expected, what do you think would happen if everyone would do the same ? On the same topic, respect your fellow engineers' time, always ask your and their managers first.
Last, you might have to talk to consultants, now (hi, it's me). It doesn't matter if they are strategy, management or AI consultancy. What does matter is that they have MUCH MORE political power than you. So, if you don't like their ideas or their approach, remember to always be nice and helpful or you will be shunted, demoted and removed from valuable teams and projects.
Welcome aboard.