If you duplicated your wordpress page and it’s not displaying well like the main page, there are a few things you need to do.
Go to the Pages Tab in your Dashboard.
Locate the page in question and click on Edit with Elementor.
(This method works if you have Elementor installed)
Once the page opens in Elementor, edit a few things and click on Update.
Go back and view the page again.
This time, the page should display and look like just the original page.
Hope this was useful.
Like and comment.
Keep winning.