Right now there is no way to delete mass products from Ali Orders dashboard. You have to delete one by one product.
However, you can bulk delete products from Shopify dashboard. Just simply go to Shopidy admin > Go to the Product page > Select products you want to delete > Choose “Bulk Actions” and then “Delete selected products”.
Should you have any other concern, feel free to let us know via our live chat channel by clicking on the bottom right icon inside app, or our email at email@example.com.