Practice Session starting whilst a Webinar is running

Welcome to the Zoom Community, @AlisonK.

It depends. Are these webinars all owned by the same user, and not part of a Zoom Event?  If this is the case, you are unlikely to be able to do this – and you can confirm this by simply setting up two test webinars and trying it out.

If you stagger the ownership between two different users and use Scheduling Privilege to share ownership, you could probably get away with it. Again, create a test scenario and make sure it works for you – there are many variables in any scenario, and you’re better off testing to be sure.