I was on the fence about such an identification. The first "list with highlighted key points" seemed quite awkward to me and definitely raised suspicion (the overall list doesn't have quite the coherence I'd expect from someone who makes the conscious choice; and the formatting exactly matches the stereotype).

But if this is LLM content then it does seem like the LLMs are still improving. (I suppose the AI flavour could be from Grammarly's new features or something.)