PHP - Not working on Mac, showing directory listing instead of running index.php

Question

After installing PHP on my Mac with brew install php and followed these given instructions on Terminal,

To enable PHP in Apache add the following to httpd.conf and restart Apache:

LoadModule php_module /opt/homebrew/opt/php/lib/httpd/modules/libphp.so

<FilesMatch \.php$>
  SetHandler application/x-httpd-php
</FilesMatch>

Finally, check DirectoryIndex includes index.php

DirectoryIndex index.php index.html

and brew services restart httpd and brew services start php and add index.php to my www directory and chmod 755 it and http://localhost, at the end I got Index of / directory listing instead of index.php PHP code execution result.

Run apachectl -M also showed php_module (shared) on the list.

Did I miss something?