As a member commenter in Air you cannot create share links. Member Commenters can only access and copy links that have already been generated by an Admin or Editor. If a Commenter tries to generate a new share link, they’ll see a message like “No shareable link” or “You do not have permissions to create this link.”
Need to generate your own links? Reach out to any admin or editor on your workspace and request that your role be updated to Editor or Admin.