Display stock status on variable products in shop for WooCommerce

functions.php

add_action( 'woocommerce_after_shop_loop_item', 'wc_echo_stock_variations_loop' );
    
function wc_echo_stock_variations_loop(){
    global $product;
    if ( $product->get_type() == 'variable' ) {
        foreach ( $product->get_available_variations() as $key ) {
            $variation = wc_get_product( $key['variation_id'] );
            $stock = $variation->get_availability();
            $stock_string = $stock['availability'] ? $stock['availability'] : __( 'In stock', 'woocommerce' );
            $attr_string = array();
            foreach ( $key['attributes'] as $attr_name => $attr_value ) {
                $attr_string[] = $attr_value;
            }
            echo '<br/>' . implode( ', ', $attr_string ) . ': ' . $stock_string;
        }
    }
}

https://www.businessbloomer.com/woocommerce-display-variations-name-stock-shop-page/