I've seen "summarise this" and "explain this code" buttons added to technical documentation. This works reasonably well for most common situations, which is probably the reason it's one of the few "production" uses for LLMs. I didn't know Amazon was using it though.
Microsoft has a note on some of their documentation, something like; "this article was written with the help of an AI and edited by a human".
I have a feeling this won't lead to informative to-the-point documentation. It will get bloated because an LLM will spew out reams of bullet point ridden paragraphs, which will need a "summarise this" button to stop the reader nodding off.
Rinse and repeat.
It is actually happening now.
I've noticed amazon reviews have an AI summary at the top, reading the reviews for you and even pointing out shortcomings.