WooCommerce Add custom Order actions to Order action meta box

functions.php

<?php
/*
 *	WC - Add custom Order actions to Order action meta box 
 *********************************************************** */
add_action('woocommerce_order_actions', 'custom_wc_order_action', 10, 1 );
function custom_wc_order_action( $actions ) {
	
	if ( is_array( $actions ) ) {
		$actions['custom_action_one'] = __( 'My custom action One' );
		$actions['custom_action_two'] = __( 'My custom action Two' );
	}

	return $actions;
}

//Filter name is woocommerce_order_action_{$action_slug}
add_action( 'woocommerce_order_action_custom_action_one', 'my_custom_actionOne' );
function my_custom_actionOne( $order ) {
	
  //...
}

//Filter name is woocommerce_order_action_{$action_slug}
add_action( 'woocommerce_order_action_custom_action_two', 'my_custom_actionTwo' );
function my_custom_actionTwo( $order ) {
	
  //...
}

?>

Related with https://gist.github.com/jgarciaruiz/098e3a5f40f22fab04242b4ea41366c3