Hi @3CLadmin
Yes, unfortunately, Breakout Rooms do not exist in Webinar.
Managing very large events with Meetings instead (with Breakout Rooms) is possible - but can take a lot of management!
You may want to look at Zoom Events - and specifically Zoom Events Conference (coming soon) which will allow multiple Zoom sessions of different types simultaneously inside a single Event.
Or contact Zoom Education for any other options.
Rupert