Showing posts in the link menu instead of categories

Hello!

I’d like to know if it’s easy to make it so that my link menu on the right will not show categories, but only posts.

For instance, my menus show:
https://www.thediamondbuyingguide.ca/category/diamond-certification/
https://www.thediamondbuyingguide.ca/category/diamond-shapes/
etc.

But I’d like it to show:
https://www.thediamondbuyingguide.ca/diamond-certification/
https://www.thediamondbuyingguide.ca/diamond-shapes/

which are individual posts in each category.

I did take a look at the sidebar.php of the Big City theme… and I figured out that < ?php wp_list_cats(‘sort_column=name&hierarchical=1’); ? > is showing the categories… Is there a function to show all the subposts directly?

Thanks!

John