have existing chat from main room accessible when joining breakout rooms

Hello ,

I need to share some instructions on chat with participants, then send participants to breakout rooms.

When they enter a breakout room, chat from main room is no longer present (chat is empty).

How to make chat contents (as it were before joining a breakout room) accessible in breakout rooms?

Also tried Broadcast message to all, that's not an alternative.

This isn't mentioned at https://blog.zoom.us/using-zoom-breakout-rooms/

but this other doc https://management.buffalo.edu/content/dam/mgt/Internal/Faculty-Resources/Documents/Zoom-Breakout-Rooms-Limitations-Features.pdf

says "Your chat history follows you. This means while attendees are in a breakout room, they will still
be able to view the chat messages from the main room prior to entering a breakout room. " -- this is what I need, but tested with participants (joined from web browser) and Chat clears when entering breakout.

Thanks!