Earlier quoted context omitted.
Does Google make its own content which gets preferentially treated based on AMP, or why is this anticompetitive?
It's not anticompetitive. It's a web standard that anyone can roll on their own domain (like amp.reddit.com), or host on a certified CDN (like Cloudflare) to get the icon in search results. Bing, Yandex, etc. can add icons or carousels in their results too if they wanted to.
- https://blogs.bing.com/search/September-2016/bing-app-joins-...
- https://blogs.bing.com/Webmaster-Blog/September-2018/Introdu...
- https://www.bing.com/amp/s/venturebeat.com/2019/05/09/google...
Microsoft is part of the AMP Project's governance as well, along with Cloudflare, Twitter, and other members: https://blog.amp.dev/2018/11/30/amp-projects-new-governance-...
I wouldn't be surprised if AMP starts appearing in other Bing search results, or if they start supporting links to AMP pages other than news articles in their carousels (which when you get down to it is basically all this announcement is about).