I'm speaking from experience, not handbooks or policies.
In fact, AWS is the least 'blame game' playing company I've worked at. The mindset of fix the problem and not to find some scapegoat is strong at least in my org, I really do appreciate this because it aligns with my personal belief.
Same here, I've made some huge fuck ups in my time at Amazon, one of which I was pretty new and assumed I would be fired for; but one of the principal engineers on my team told me not to worry, these things happen and it's a blameless process where we're just trying to get to the root cause of the problem and ensure it never happens again; and it was exactly as he said. The CoE we presented said "An engineer from the xyz team..." and never mentioned a name once.