Can’t see all pages in menu edit

Are you able to share a URL to directly to the published page that you are trying to add to the menu?

The problem is in the backend

suggestions:
-confirm the page is published (not draft, private, trashed)
-are you able to check in database for how the page is set up?
-test for possible plugin conflict – you can use a tool like
install health check plugin which can be used in troubleshooting mode to deactivate all plugins and theme
might help narrow down the source of the issue
https://www.ads-software.com/plugins/health-check/

I think it’s about this plugin:

https://codecanyon.net/item/privatecontent-multilevel-content-plugin/1467885

Nevermind, I’m gonna use a custom link.