Google released a very clear video introducing the following Page experience update. As you know, headlines no longer require AMP and signature exchange support will allow Google to prefetch these pages and load them immediately.
We have discussed all of these many times here, and there is a big Frequently asked questions about changes If you missed it. And, here is a video about the changes in popular stories, for those who like to consume these things through video content, this is a good overview of these changes:
The short part is that now Google can use Core Web Vitals to verify that your page is fast, it no longer requires AMP page verification for this purpose, so any page is now eligible to contain headlines.I should add Not all core web elements need to be met Including headlines.
Discussion in the forum Twitter.