new page within the dashboard

Hi

I wish to add a new tab to the dashboard, that links to a page I have created using Elementor. But I would like to view this page WITHIN the dashboard. Similar to how all of the other tabs work.

I happened to come acrosss this post.
https://wordpress.org/support/topic/how-to-add-a-new-page-within-the-dashboard/#post-15692185

but not sure if this works. do you have any official document for this effort?

Thank you