Are you sure you ran “sudo httpd -t -D DUMP_VHOSTS”? AFAICT I didn't misspell it. Did CentOS 8 remove support for it or something? It's supposed to produce something like in this post:
The web server on that IP address was configured to use that certificate somehow. If it's your Apache server, it is probably specified in another configuration file. Which is why getting a list of Apache's view of configuration files and virtual hosts is useful.