Are the Copilot saved prompts extensible for Microsoft Word?

As a partner, can I tailor the saved prompts for my users in Microsoft Word? Is it extensible? This would greatly accelerate adoption. Especially with use cases for plug-ins. Use Case example: as a partner, I have a custom plug-in that provides valuable info for specific prompt use cases. The most valuable prompt suggestions for the partner data source are only a click away for the end user.