I suggest to generate gh-pages at https://github.com/RedHatInsights/uhc-portal as a single page chart (maybe using React) to expose data. Data should be generated by a GH actions job.
Let me expose example.

See Gh-pages example at https://kiegroup.github.io/droolsjbpm-build-bootstrap/job/productization-jobs
see source code at https://github.com/kiegroup/droolsjbpm-build-bootstrap/tree/gh-pages

If you check network tab a couple of json files (product.json and latest.json) are retrieved

those files are generated by gh job from time to time, see https://github.com/kiegroup/droolsjbpm-build-bootstrap/blob/main/.github/workflows/generate_status_page_data.yaml

For us it would be to generate single page, retrieving json containing information like

[
  {
    "username": "Ginxo",
    "pr": [
      { "id": "x", "reviewed": true },
      { "id": "y", "reviewed": true },
      { "id": "z", "reviewed": false }
    ]
  },
  { "username": "Eliran", "pr": [{ "id": "x", "reviewed": true }] },
  {
    "username": "Dave",
    "pr": [
      { "id": "y", "reviewed": false },
      { "id": "z", "reviewed": true }
    ]
  }
]

and expose GH job to generate that info using octokit