Is there a way to spotlight (pin) a specific participant for all the participants in prebuilt?

We want to hold an event where one person is a main speaker with video on and the other one is a moderator with video off.

In active speaker mode, the active speaker changes when the moderator talks and the participants see the moderator's blank video for few seconds, which is unnecessary.

I would like to have "spotlight" function like the one in zoom in prebuilt UI. Is there any ways to do this?