Student engagement is a fulcrum upon which a successful synchronous session can turn. When possible, it is important to find ways to make the technology use efficient so that you and your students can focus on the actual engagement. One way you can help with efficiency is to leverage pre-assigned breakout groups/rooms in Zoom for your students.
For details on how to pre-assign breakout rooms in Zoom, see the recent article in SHSU Online's eLearning Support Blog.