Code Review comes with several different blog posts section patterns you can use for your pages, especially your homepage.
Most of the patterns simply show your latest posts and will be updated when you publish a new post.
A couple of patterns have a specific featured post alongside the latest posts. You can change this post by selecting the single content block inside of it and selecting a new post.
All of the posts in each section can be changed by removing them and then going to the “Posts” pattern category and selecting the style of post you want in its place.