Thanks so much for your fascinating question. Many of us find ourselves living in two or three different ecosystems. We do some of our work in Google Workspace for Education and some in Microsoft 365. Others even manage to get work done with Chromebooks in Microsoft 365 or using Google tools with Apple iPads.
In this particular case, it is possible to convert Google Jamboard documents, and when done, you’ll be able to use a Google Jamboard in a Microsoft Whiteboard. I will also explain how to bring Microsoft Whiteboard templates into Google’s Jamboard, in case you were curious.