--- a/wp/wp-admin/menu.php	Tue Dec 15 15:52:01 2020 +0100
+++ b/wp/wp-admin/menu.php	Wed Sep 21 18:19:35 2022 +0200
@@ -185,8 +185,22 @@
 
 $appearance_cap = current_user_can( 'switch_themes' ) ? 'switch_themes' : 'edit_theme_options';
 
-$menu[60]                     = array( __( 'Appearance' ), $appearance_cap, 'themes.php', '', 'menu-top menu-icon-appearance', 'menu-appearance', 'dashicons-admin-appearance' );
-	$submenu['themes.php'][5] = array( __( 'Themes' ), $appearance_cap, 'themes.php' );
+$menu[60] = array( __( 'Appearance' ), $appearance_cap, 'themes.php', '', 'menu-top menu-icon-appearance', 'menu-appearance', 'dashicons-admin-appearance' );
+
+$count = '';
+if ( ! is_multisite() && current_user_can( 'update_themes' ) ) {
+	if ( ! isset( $update_data ) ) {
+		$update_data = wp_get_update_data();
+	}
+	$count = sprintf(
+		'<span class="update-plugins count-%s"><span class="theme-count">%s</span></span>',
+		$update_data['counts']['themes'],
+		number_format_i18n( $update_data['counts']['themes'] )
+	);
+}
+
+	/* translators: %s: Number of available theme updates. */
+	$submenu['themes.php'][5] = array( sprintf( __( 'Themes %s' ), $count ), $appearance_cap, 'themes.php' );
 
 	$customize_url            = add_query_arg( 'return', urlencode( remove_query_arg( wp_removable_query_args(), wp_unslash( $_SERVER['REQUEST_URI'] ) ) ), 'customize.php' );
 	$submenu['themes.php'][6] = array( __( 'Customize' ), 'customize', esc_url( $customize_url ), '', 'hide-if-no-customize' );
@@ -209,12 +223,12 @@
 
 unset( $appearance_cap );
 
-// Add 'Editor' to the bottom of the Appearance menu.
+// Add 'Theme Editor' to the bottom of the Appearance menu.
 if ( ! is_multisite() ) {
 	add_action( 'admin_menu', '_add_themes_utility_last', 101 );
 }
 /**
- * Adds the (theme) 'Editor' link to the bottom of the Appearance menu.
+ * Adds the 'Theme Editor' link to the bottom of the Appearance menu.
  *
  * @access private
  * @since 3.0.0
@@ -236,7 +250,7 @@
 	);
 }
 
-/* translators: %s: Number of pending plugin updates. */
+/* translators: %s: Number of available plugin updates. */
 $menu[65] = array( sprintf( __( 'Plugins %s' ), $count ), 'activate_plugins', 'plugins.php', '', 'menu-top menu-icon-plugins', 'menu-plugins', 'dashicons-admin-plugins' );
 
 $submenu['plugins.php'][5] = array( __( 'Installed Plugins' ), 'activate_plugins', 'plugins.php' );