Hi there,
Thanks for writing in.
Yes, you can always wrap your existing content before or after you made it (if it’s a shortcode like you provided). If it’s existing visual composer content, then you’ll have to add visibility first, then drag your existing content and drop on it. Then move your entire visibility element to where it’s supposed to appear.
I checked your page and it’s purely shortcode (eg. structure are not formatted for visual composer), you can just wrap your existing content 🙂
Thanks!