Can I add a customizable author box in my blog post code?

Hi, I am new to Shopify, is it possible to edit the backend code of this Blog Post?

I need to add another box (like Author Box Information) where the user has the flexibility to enter and modify inside of it and display it on the Blog Content (like adding a code).

And also the entered content can be used again for the other Blog Post.

No, you can not add anything in shopify admin panel

@Hardik29418 okay, but is there a way to create another section field inside in the Blog Posts?