If you wish to print the payment gateway name on order emails, Use the below PHP snippet.
All you need to use is the “woocommerce_email_after_order_table” hook to pick the correct position, and then the “get_payment_method_title” WooCommerce function to return the payment gateway name.
Display Payment Gateway name in woocommerce order emails
add_action( 'woocommerce_email_after_order_table', codeamend_display_payment_type_name_emails, 15 );
function codeamend_display_payment_type_name_emails( $order ) {
echo '<h3>Payment Method:</h3><p> ' . $order->get_payment_method_title() . '</p>';
}