aaPanel_Kern Hello,
You can view this file. If this file is not these contents, it may be caused by using nginx installed using system commands.
/www/server/nginx/html/index.html
Unfortunately I don't have that file (picture below)

In fact, when someone puts in the IP address of my server, they get the Ngnix default page. I would change that page (IP page) to something else. So now the default Ngnix page comes up when someone enters the IP address on the web browser and that's why I asked this question. I want to edit the server IP website.