add_filter( 'woocommerce_new_customer_data', 'my_custom_user_data'); function my_custom_user_data( $new_customer_data ) { …
user role
Set custom user role during WooCommerce checkout
add_filter( 'woocommerce_new_customer_data', 'my_custom_user_data'); function my_custom_user_data( $new_customer_data ) { …