Hi walidmoujib7,
Thanks for reaching to us.
Checkout page is default WooCommerce functionalities and WoodMart does not control it. We currently support enable / disable fields only, you can read more here https://xtemos.com/docs-topic/fields-manager/
For specialized assistance and potential solutions, I kindly suggest that you reach out directly to the WooCommerce plugin’s support team https://wordpress.org/support/plugin/woocommerce/, who are better equipped to provide you with the guidance you requires or You need to find a third party plugin to achieve more functionality that best suits you.
Regards,