Export a Multi-Board Show
Follow the guide in the software for exporting animations.
Exporting Animations Software GuideYou will need to be sure to export AFTER you have set up the bridge and peer relationships in the project. Once set up, you will see during the export process that in the “select drivers and effectors” stage of exporting, the relationship of bridge to peers is expressed.

When you export, you will export files for only the bridge / show controller device. The exported files for that device contain the animation data for all peers as well.