CODE EXAMPLE FOR PHP

wc php get product variation stock

function get_stock_variations_from_product(){
    global $product;
    $variations = $product->get_available_variations();
    foreach($variations as $variation){
         $variation_id = $variation['variation_id'];
         $variation_obj = new WC_Product_variation($variation_id);
         $stock = $variation_obj->get_stock_quantity();
    }
}