Elements on main blog page
I'd like to create a different blog page, that doesn't have just posts but a banner, featured post, etc. However, when entering the Betheme documentation, it is asked not to include anything on that page:
But this page [https://themes.muffingroup.com/be/insurance3/blog/] seems to follow a different rule: when entering the Blog, there is an introductory text, then a featured post, and after that, follow the other posts.
How could I insert other elements [like an introductory text and a featured post, as in the example] on my main blog page [https://www.elaineyanagui.com/blog/]?