Align an element to the right of the blog post element text

Question:
How can I put an element right after the blog post’s right border? Can I use Velo code to access the blog post’s children and move my element to the right edge of the blog post text?

Product:
Editor X

What are you trying to achieve:
I`m trying to put an element right after the blog post’s right border.

What have you already tried:
I tried using the page script as well a custom element.