How to display a post in a container certain link is clicked?

I’m trying to make a support page for my application using Webflow, I’ve made a custom navigation in the left, using nested CMS structures and I want to display a specific post when the menu is active. I’ve attached images and the link to my site here, please help me out.

As seen in the image, I would like to display the Test post when I click on Forgot your username. How can this be done?

Check the policy page


Here is my site Read-Only: LINK
(how to share your site Read-Only link)