Possible to use the GraphQL API to know whether a reviewer has been auto-assigned to a pull request?

[eroth]

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Hi, reviewers for pull requests in our repo can be auto-assigned. When this happens, I see text like pr-author requested review from pr-reviewer (assigned from org/repo) on the pull request web UI. I would like to be able to know whether a reviewer came from auto-assignment by algorithm (the example I provided) or by the PR author explicitly requesting a reviewer using the GraphQL API. Is this possible?

Querying pull request timelineItems and ReviewRequestedEvent, I can see when a requested reviewer was a team but cannot see a way to know whether the team performed the assigmnent or not (the actor is always User even when I can see in the pull request web UI that they were assigned). I've also queried AssignedEvent but that seems to be just for if a user self-assigns themselves to a pull request.

Here's an example of what I'm talking about that illustrates my above example (requested reviewer in second node was actually auto-assigned):

              "timelineItems": {
                "nodes": [
                  {
                    "__typename": "ReviewRequestedEvent",
                    "actor": {
                      "__typename": "User",
                      "login": "pr-author"
                    },
                    "createdAt": "2024-06-11T02:21:26Z",
                    "requestedReviewer": {
                      "__typename": "Team",
                      "name": "our-team"
                    }
                  },
                  {
                    "__typename": "ReviewRequestedEvent",
                    "actor": {
                      "__typename": "User",
                      "login": "pr-author"
                    },
                    "createdAt": "2024-06-11T02:21:27Z",
                    "requestedReviewer": {
                      "__typename": "User",
                      "login": "pr-reviewer"
                    }
                  },
...

Thanks for any help!