One domain they currently do use is .bot [1] – it's limited to verified chatbots only.
[1]: https://www.amazonregistry.com/bot
There are many more they’ve been sitting on for a few years now. .bot was the most recent to launch and that was a good few years ago now [1].
Of course, there’s also the saga with Brazil over .amazon
[1] https://aws.amazon.com/blogs/aws/new-bot-gtld-from-amazon/
One domain they currently do use is .bot [1] – it's limited to verified chatbots only.
[1]: https://www.amazonregistry.com/bot