Enabling participants external to the organization to collaborate on a whiteboard template

There are a few parameters at zoom.us/account/setting -> Whiteboard that pertain to external access/sharing - please check these first:

Note that you'll need to be an account admin to access these settings. They can be further restricted at the Group and User levels as well.

Hi - I would like to use whiteboards in breakout rooms for workshops. During breakout sessions external participants can use Zoom whiteboard templates but they cannot use my custom workshop templates without registration. Any chance to use custom templates in breakout rooms without registration?