Amazon literally has a video game unit. The game on Steam with the 5th most online players (as of the time of posting this comment) was made by Amazon: https://steamcharts.com/app/1599340
Disclosure: I don't think it really biases anything about this comment, but AWS is my current employer.
Better examples of games developed by Amazon Game Studios would be Lost World or Crucible.
Weirdly, MMOs actually fit Amazon's business model better than off the shelf games. You pay for access, like Amazon prime. I'm surprised they didn't bundle in new world into prime membership as a way of catapulting their video game unit expansion. That's much more their modus operandi; expand first and just the intense scale to force improvement over time.
Also, AGS is making a single player game, at least according to this press release:
https://www.amazongames.com/en-us/news/articles/amazon-games...