Getting the sub folder install location for WordPress if its not installed in the site root

Simple home_url() method

  wp_redirect( home_url( '/' ) );
  //wp_redirect( home_url( '/my_page_name' ) );    //If you want to redirect to a specific page
  die();

Getting it in code

  //Get WordPress sub folder path if its not instlaled on the site root
  $SiteUrl = get_site_url();
  $ParsedUrl = parse_url($SiteUrl);
  $WordpressInstallSubPath = trim($ParsedUrl['path'] ?? '', '/');   //Trim leading/trailing slashes and return full path (if any)
  if (strlen($WordpressInstallSubPath) > 0)
    $WordpressInstallSubPath = '/' . $WordpressInstallSubPath;   
  //Install URL                       $WordpressInstallSubPath
  //https://example.com	              '' (empty — root)
  //https://example.com/wordpress	    '/wordpress'
  //https://example.com/blog/wp	      '/blog/wp'
  //https://example.com/a/b/c	        '/a/b/c'