How to show content of subdirectory, even if url is of root directory

.htaccess

lsapi_phpini /home/shilurss/public_html/php.ini

RewriteEngine On
RewriteCond %{SERVER_PORT} 80
RewriteRule ^(.*)$ https://xyz.com/$1 [R,L]



// suppose the file is located in public_html/abc/index.html
now currently, xyz.com/abc/ loads the file

I want the file to load at (Basically serve data from another dir but without any redirect (sort of internal url resolution ))
xyz.com/