Hi diengmbayeserigne,

Thanks for reaching to us.

The checkout form is the Woocommerce functionality and WoodMart theme does not have any options to add or remove the required and optional fields in the checkout.

You can slightly configure the checkout in Appearance > Customize > Woocommerce > Checkout.

Please check this manual:
https://woocommerce.com/posts/customize-checkout-fields-woocommerce/

Regards,