Within your wordpress dashboard, go to appearance -> settings -> woocommerce -> checkout
Here, you can add the text to the checkbox to require that the user agrees to your Privacy Policy. Simply use the [privacy_policy] shortcode.
For example, you can state "I have read and agree to the website [terms] and [privacy_policy]."
If you have any issues, you are welcome to contact us or you can check out this more extensive step-by-step third party article: https://rudrastyh.com/woocommerce/checkout-privacy-policy-terms-and-conditions.html