By default nobody at 20xwork looks at customer data. Access is granted to named engineers for a specific purpose, such as diagnosing a fault you have reported, for a limited time, and every access is written to an audit log that your admin can request.
Support staff work from screenshots and exports you choose to share, or from a session you start with them.
Admin "view as" inside the product, which lets your own admin see the product as one of your employees sees it, is restricted to your organisation's admins and is itself audited.