In Attendee Hub, is it possible to make a card that links to a specific speaker profile (like the keynote speaker's) or a specific exhibitor profile (thinking about linking to a sponsor profile)? Or is it only possible to link to the Speakers page or Exhibitors page in general?
Yes you can! For the speakers, in their speaker profile, switch the "Feature Speaker on Event App" to 'Yes' and they will automatically appear in a card on the home page.
In the exhibitor portal, when you add an exhibitor, you have the same option under "Exhibitor Statuses" for the same result:
Hope that helps!