Edit php files in the plugin

I need to change order of First name and Last name fileds on the registration screen, which meets Japanese style. In order to realize it, I need to edit the file of /wp-content/plugins/woo-coupon-usage-pro/inc/registration/registration-form.php. I , however, do not want to directry edit the PHP file in plugin folder so that I copy it to various directory structures of Child-theme of Mesmerize-Child and then edit the file. Unfortunately, it seems to me nothing is worked to overwrite the original file. I think the plugin does not have such feature of copy files to child theme. I really appreciate if you could add the feature.