Hey,
thanks for reaching out and sorry for the late reply!
Unfortunately I can’t replicate the issue on my side.
The thing is that at the very basic level, default WP search looks for your queries in the published posts and pages — literal matches primarily.
Search Everything improves that WordPress default search functionality. In other words, you do not need to set anything special in the plugin settings in order to search the pages. Have you tried disabling the plugin, search for pages and it works?
Would it be possible to give me a link to your blog, so that I can take a closer look?
Looking forward to your reply,
Petra