Yes, you can add your own data policy and/or terms & conditions to your booking page and prompt your clients to accept them by clicking a checkbox.
Simply go to "Settings", click on "Account Settings" and select the tab "Data Policy and T&C".
Select the toggle "I want to show my own Terms and Conditions and Data Policy to my clients" and the following fields will appear.
Once saved, your clients will be prompted to accept your data policy and terms & conditions. When clicking on the links, your data policy and terms & conditions will open as a pop-up.