Snippet to hide the checkout field(s) based on the WooCommerce shipping method. Supports PluginHive Shipping Plugins: https://www.pluginhive.com/product-category/woocommerce-plugin/woocommerce-shipping/

functoin.php

add_filter('woocommerce_checkout_fields', 'xa_remove_billing_checkout_fields');

function xa_remove_billing_checkout_fields($fields) {
    $shipping_method ='free_shipping:1'; // Set the desired shipping method to hide the checkout field(s).
    global $woocommerce;
    $chosen_methods = WC()->session->get( 'chosen_shipping_methods' );
    $chosen_shipping = $chosen_methods[0];

    if ($chosen_shipping == $shipping_method) {
        unset($fields['billing']['billing_address_1']); // Add/change filed name to be hide
        unset($fields['billing']['billing_address_2']);
    }
    return $fields;
}