remove shipping methods based on city

function.php

// tweak for city shipping options
add_filter('woocommerce_package_rates', 'restrict_shipping_options_based_on_city', 10, 2);    
function restrict_shipping_options_based_on_city($available_shipping_methods, $package){
    global $woocommerce;

    // Config this array with city names and corresponding shipping methods to hide.
    $country_list = array(
        'Cefa' => array('flat_rate','free_shipping'),
    );
    
    //get shipping city (or anything else you need to filter)
    $customer_country = $woocommerce->customer->get_shipping_city();
    
    //do the checks
    if ( in_array( $customer_country , array_keys($country_list) ) ) {
        if( !empty( $country_list[$customer_country] ) ){
            foreach ($country_list[$customer_country] as $shipping_methods) {
                foreach ($available_shipping_methods as $shipping_method => $value) {
                    if( strpos( $shipping_method, $shipping_methods ) !== false ) {
                        unset($available_shipping_methods[$shipping_method]);
                    }
                }
            }
        }
    }

    return $available_shipping_methods;
}