Checkbox condition and submit button - for GDPR or policy privacy in PRO FORM

Hi all,
simple question, but I can’t find it on the forum or in the documentation.

How can I create, in nestable pro forms, a condition so that only after clicking on the GDPR and privacy policy checkbox will the button be clickable?

What parameters do I need to set in the checkbox, and what conditions on the conditional wrapper, so that unchecking the checkbox affects the button?

I am trying values of 0 or 1, and non-statutory values, but with the checkbox no condition works at all, I have also tried array, srtring, number and various operators and cannot get it to work.

Can you advise me how to set this up correctly?