The Web UI allows you to edit the start time of an incident and to edit the amount of downtime that is recorded for a component. There are no published APIs corresponding to this functionality.
Using the browser network history, I can see one unpublished API that is used for editing component downtime, and can see that GraphQL is used for editing the incident start time, but I can't make use of unpublished APIs for a production product.
Are there any plans to publish API documentation for this functionality?