Reply To: Woodmart widget stock status AND instead of OR

Hello,

Try to add the following PHP code snippet to the child theme functions.php file to do this

add_action( 'init', 'wd_update_product_query' );

function wd_update_product_query() {
	if ( class_exists('WOODMART_Stock_Status' ) ) {
		remove_action( 'woocommerce_product_query', array( 'WOODMART_Stock_Status', 'show_in_stock_products' ) );
	}

	add_action( 'woocommerce_product_query', function ( $query ) {
		$current_stock_status = isset( $_GET['stock_status'] ) ? explode( ',', $_GET['stock_status'] ) : array(); //phpcs:ignore

		if ( in_array( 'instock', $current_stock_status, true ) || in_array( 'onbackorder', $current_stock_status, true ) ) {
			$meta_query = array(
				'relation' => 'OR',
			);

			if ( in_array( 'instock', $current_stock_status, true ) ) {
				$meta_query[] = array(
					'key'     => '_stock_status',
					'value'   => 'instock',
					'compare' => '=',
				);
			}

			if ( in_array( 'onbackorder', $current_stock_status, true ) ) {
				$meta_query[] = array(
					'key'     => '_stock_status',
					'value'   => 'onbackorder',
					'compare' => '=',
				);
			}

			$query->set( 'meta_query', array_merge( WC()->query->get_meta_query(), $meta_query ) );
		}
	} );

Kind Regards