Hi, it is set to show posts and products only in the settings, but still shows pages there. see the screenshots in the private content area.
There you can see it is showing the homepage.
Here is the website URL: https://www.reviewcellular.com/
You can throw any URL which will show a 404 page then you can try searching from that search bar below the 404 heading: https://prnt.sc/Nw-hrIkaMH1b