Github Actions script that takes a mkdocs repository, renders it, and pushes to gh-pages. A "manual" way of doing what I found an existing action to do. All the plugins and mkdocs are in the Install Packages step, edit to match your needs.

deploy_mkdocs_to_gh-pages.yml

name: Deploy
on:
  push:
    branches:
      - main
jobs:
  build:
    name: Deploy docs to GitHub Pages
    runs-on: ubuntu-latest
    steps:
      - name: Checkout 
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - name: Install Python
        uses: actions/setup-python@v2
      - name: Install Wheel Package
        uses: BSFishy/pip-action@v1
        with:
          packages: wheel
      - name: Install Packages
        uses: BSFishy/pip-action@v1
        with:
          packages: |
            mkdocs
            pygments
            mkdocs-material
            mkdocs-safe-text-plugin
            git+https://github.com/jldiaz/mkdocs-plugin-tags.git
            mkdocs-markdownextradata-plugin
            mkdocs-codeinclude-plugin
            mkdocs-git-revision-date-localized-plugin
            mkdocs-git-authors-plugin
            mkdocs-blog-plugin
            mkdocs-img2fig-plugin
            mkdocs-mermaid2-plugin
            mkdocs-awesome-pages-plugin
            git+https://github.com/andyoakley/mkdocs-navtitles
            mkdocs-redirects 
            mkdocs-minify-plugin
            mkdocs-git-authors-plugin
      - name: Build
        run: mkdocs build
      - name: Publish  
        uses: peaceiris/actions-gh-pages@v3
        with:
          github_token: ${{ secrets.GITHUB_TOKEN }}
          publish_dir: ./site