The decision to restrict or not is made exclusively by the submitting author. You can see the ETD Access Status Options here, https://guides.lib.vt.edu/c.php?g=547528&p=3815991. Most theses and dissertations will be available after a year embargo.
Email vtechworks@vt.edu. They will contact the author to see if they are willing to change the restricted status so that it is freely accessible to all.