add page navigation to individual pages

Hi. I want to add navigation menus to individual pages. I am not using “widgets” because they repeat on each page.
Is there a plug-in to use?
Or another way?
I have parent pages that have great (automatic) drop down menus, but if you actually navigate to the page, it is blank. I want to repeat the drop down menu with full function to get to the page.
https://www.databasedog.com/wordpress/?page_id=45
thanks!