The GraphQL API contains a contributionsCollection endpoint which is excellent for writing work reports:

query {
  viewer {
    contributionsCollection {
      pullRequestContributionsByRepository {
        repository {
          nameWithOwner
        }
        contributions {
          nodes {
            pullRequest {
              createdAt
              title
              url
            }
          }
        }
      }
}
}
}
 

To my knowlege, it is impossible to get this query to include private contributions, even when appropriately authenticated (although I can do things like counting the number of contributions that can’t be shown). This is corroborated by a recent answer on this forum. I feel that this would a really valuable feature to add, if possible.