Hello,
Go to templates folder of WooCommerce plugin >> open content-single-product.php >> you will see all hooks and its priority there. It looks like this.
/**
* Hook: woocommerce_single_product_summary.
*
* @hooked woocommerce_template_single_title - 5
* @hooked woocommerce_template_single_rating - 10
* @hooked woocommerce_template_single_price - 10
* @hooked woocommerce_template_single_excerpt - 20
* @hooked woocommerce_template_single_add_to_cart - 30
* @hooked woocommerce_template_single_meta - 40
* @hooked woocommerce_template_single_sharing - 50
* @hooked WC_Structured_Data::generate_product_data() - 60
*/
do_action( 'woocommerce_single_product_summary' );
To changing priority of any hook, you need to remove its hook first. Example code look like this:
remove_action( 'woocommerce_single_product_summary', 'woocommerce_template_single_price', 10 );
And set new priority like this:
add_action('woocommerce_single_product_summary', 'woocommerce_template_single_price', 25);
Hope this will help.