GitHub Reviews API does not distinguish between re-reviews and edits of the existing list of requested reviewers

GitHub Reviews API does not distinguish between re-reviews and edits of the existing list of requested reviewers.

https://docs.github.com/en/rest/reference/pulls#reviews

I would like to send the review owner a notification when the review owner has submitted a request to a reviewer for a re-review, but not when the existing list of requested reviewers has been edited. I do not believe this is currently possible.

If it is possible - how?
If it is not possible - how can I request that GitHub add this functionality to their API?

Thank you.