How can I make the address field optional?

Question

WooCommerce

Guys, tell me what could be the jamb. I make the address field, on the checkout page, optional

add_filter( 'woocommerce_default_address_fields' , 'optional_default_address_fields', 10, 1 );
function optional_default_address_fields( $address_fields  ) {
  unset($address_fields['address_1']['required']);
  return $address_fields ;
}

But, when I click on the "Confirm Order" button, other fields in the "Delivery Address" are not displayed.

Moreover, if I make another field, say "Country" optional, then everything displays correctly without the Country.