We’ll go over doing this through individual functions, but you should probably create a Class that stores all of your settings methods.

The first thing you need to is add the section, which can be done like this by hooking into the woocommerce_get_sections_products filter:

/**
 * Create the section beneath the products tab
 **/
add_filter( 'woocommerce_get_sections_products', 'wcslider_add_section' );
function wcslider_add_section( $sections ) {
	
	$sections['wcslider'] = __( 'WC Slider', 'text-domain' );
	return $sections;
	
}

Make sure you change the wcslider parts to suit your extension’s name / text-domain.

The important thing about the woocommerce_get_sections_products filter, is that the last part products, is the tab you’d like to add a section to. So if you want to add a new tab to accounts section, you would hook into the woocommerce_get_sections_accounts filter.

Add this code to your child theme’s functions.php file or via a plugin that allows custom functions to be added, such as the Dessky Snippets plugin. Please don’t add custom code directly to your parent theme’s functions.php file as this will be overwritten completely when you update the theme.