Set minimum order amount ($) based on Shipping Zone in WooCommerce and disable checkout page if it is not met

// Set a minimum amount of oder based on shipping zone before checking out

add_action( 'woocommerce_check_cart_items', 'cw_min_num_products' );

// Only run in the Cart or Checkout pages
function cw_min_num_products() {
	
	if( is_cart() || is_checkout() ) {
		global $woocommerce;

		// Set the minimum order amount and shipping zone before checking out
        $minimum = 20;
	  	$county 	= array('NL');
		
		// Defining var total amount      
        $cart_tot_order = WC()->cart->total;
        
	  	// Compare values and add an error in Cart's total amount
	    // happens to be less than the minimum required before checking out.
		// Will display a message along the lines 
     
		if( $cart_tot_order < $minimum && in_array( WC()->customer->get_shipping_country(), $county )  ) {
			// Display error message
	        wc_add_notice( sprintf( '<strong>A Minimum order of $%s is required before checking out.</strong>' 
	        	. '<br />Current order: $%s.',
	        	$minimum,
                $cart_tot_order	),
	        'error' );
		}
	}
}

I want to add a functionality for pincode wise minimum order amount

add_action( 'woocommerce_checkout_process', 'wc_minimum_order_amount' );
add_action( 'woocommerce_before_cart' , 'wc_minimum_order_amount' );

function wc_minimum_order_amount() {
$minimum = ''; // Initializing
$postcode = ''; // Initializing

if ( isset($_POST['shipping_postcode']) && ! empty($_POST['shipping_postcode']) ) {
$postcode = $_POST['shipping_postcode'];
if ( empty($postcode) && isset($_POST['billing_postcode']) && ! empty($_POST['billing_postcode']) ) {
$postcode = $_POST['billing_postcode'];
}
} elseif ( $postcode = WC()->customer->get_shipping_postcode() ) {
if ( empty($postcode) ) {
$postcode = WC()->customer->get_billing_postcode();
}
}

$postList =[
['9000', 25],
['9008', 20],
];// Define your targeted postcodes and fees in the array

foreach ($postList as $innerArray) {

if ($innerArray[0] ===  $postcode) {
    $minimum = $innerArray[1];
    break; 
}
else{
    $minimum = 0;
}

}

if ( WC()->cart->total < $minimum && ! empty($postcode) && $minimum !== 0 ) {
$error_notice = sprintf( 'Your current order total is %s — you must have an order with a minimum of %s to place your order ' ,
wc_price( WC()->cart->total ),
wc_price( $minimum )
);

if( is_cart() ) {
    wc_print_notice( $error_notice, 'error' );
} else {
    wc_add_notice( $error_notice, 'error' );
}

}
}