@Nyan Cat - Currently, we don’t have a graph notification mechanism for letting you know when a user creates instant meeting.
We appreciate your input. To ensure your idea is considered for future updates, we recommend submitting it through the Teams Feedback Portal. Feature requests are reviewed by the engineering team and may be prioritized based on various factors, including the number of requests received.
If you have any additional thoughts or feedback, please feel free to share them with us. Your contributions are valuable and help improve the product!
Thank you again for your valuable suggestion!
Thanks,
Nivedipa
If the response is helpful, please click "Accept Answer" and upvote it. You can share your feedback via Microsoft Teams Developer Feedback link. Click here to escalate.