Instructor training refreshers as Themed Discussion Sessions

Per a request on slack from an instructor looking for a refresher, can there be a way for instructors to request topics they might want a refresher on and a way to match interested trainers as the hosts?

I know there's a form for requesting a themed discussion session, but I read it as volunteering to host, so a way that makes it clear people can request topics they are not prepared to host and a way for the IDC to help match them to hosts. Maybe the host & requester could be matched according to time-availability also, to make sure the requester is able to attend.

I'm happy to be in the pool of trainers who helps host these.