how to make checkbox by default checked in wordpress

i want to make checkbox by default as checked but i am using array format for checkbox which is given below. i am new to wordpress so don’t know much about parameters.

    add_action( 'woocommerce_review_order_before_submit','bt_add_checkout_checkbox', 10 );
/**
 * Add WooCommerce Checkbox checkout
 */
function bt_add_checkout_checkbox() {
   
    woocommerce_form_field( 'checkout-checkbox', array( // CSS ID
       'type'          => 'checkbox',
       'class'         => array('form-row mycheckbox'), // CSS Class
       'label_class'   => array('woocommerce-form__label woocommerce-form__label-for-checkbox checkbox'),
       'input_class'   => array('woocommerce-form__input woocommerce-form__input-checkbox input-checkbox'),
       'label'         => 'Ok I agree with <a href="/checkout-checkbox" target="_blank" rel="noopener">Checkout Checkbox Page</a>', // Label and Link
    ));    
}

this code is in function.php

so basically i want this checkbox as checked by defaul.