Answered by Mike, Hiring Expert at Avery Dennison Corporation, on Friday, May 24, 2019
I would absolutely follow up with the recruiter, especially if they opened the door saying that they had up and coming openings that would be ideal for you. When you do follow up, I would also suggest digging in a bit more if possible - when do they expect roles to open up, when would it be OK to follow up again, what types of roles are expected, etc.
Also, I know a lot of company systems offer "job alerts" that notify you when a specific role or job opens up. I would also check with the recruiter if that would be an option. That way, you won't have to necessarily reach to them and could wait to see if/when something opens up.
If a few months go by, and you don't hear anything back, you might be spinning your wheels. I suggest keeping in touch with the recruiter to the best of your ability, but likely focus your job search elsewhere if you haven't already. Business needs can change in an instant, and jobs that are "on the horizon" could be pulled at any time.
Best of luck in your search!