A GitHub Actions workflow to add any newly created issues to a Project within a GitHub user (pro or free) account as opposed to a GitHub Enterprise Organisation.in the main sample https://docs.github.com/en/issues/trying-out-the-new-projects-experience/automating-projects

add_issue_to_project

name: Add Issue to project
on:
 issues:
    types: [opened]
    
jobs:
  track_issue:
    runs-on: ubuntu-latest
    steps:
      - name: Get project data
        env:
          GITHUB_TOKEN: ${{secrets.PROJECT_TOKEN}}
          ACCOUNT: < a user account e.g. aperson form https://github.com/aperson >
          PROJECT_NUMBER: < a project numnbe e.g: 2 https://github.com/aperson/projects/2 >
        run: |
          gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
            query($account: String!, $number: Int!) {
              user(login: $account){
                projectNext(number: $number) {
                  id
                  fields(first:20) {
                    nodes {
                      id
                      name
                      settings
                    }
                  }
                }
              }
            }' -f account=$ACCOUNT -F number=$PROJECT_NUMBER > project_data.json
            
          echo 'PROJECT_ID='$(jq '.data.user.projectNext.id' project_data.json) >> $GITHUB_ENV
          echo 'DATE_FIELD_ID='$(jq '.data.user.projectNext.fields.nodes[] | select(.name== "Date Posted") | .id' project_data.json) >> $GITHUB_ENV
          echo 'STATUS_FIELD_ID='$(jq '.data.user.projectNext.fields.nodes[] | select(.name== "Status") | .id' project_data.json) >> $GITHUB_ENV
          echo 'TODO_OPTION_ID='$(jq '.data.user.projectNext.fields.nodes[] | select(.name== "Status") |.settings | fromjson.options[] | select(.name=="Todo") |.id' project_data.json) >> $GITHUB_ENV

      - name: Add Issue to project
        env:
          GITHUB_TOKEN: ${{secrets.PROJECT_TOKEN}}
          ISSUE_ID: ${{ github.event.issue.node_id }}
        run: |
          item_id="$( gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
            mutation($project:ID!, $issue:ID!) {
              addProjectNextItem(input: {projectId: $project, contentId: $issue}) {
                projectNextItem {
                  id
                }
              }
            }' -f project=$PROJECT_ID -f issue=$ISSUE_ID --jq '.data.addProjectNextItem.projectNextItem.id')"
          
          echo 'ITEM_ID='$item_id >> $GITHUB_ENV

      - name: Get date
        run: echo "DATE=$(date +"%Y-%m-%d")" >> $GITHUB_ENV

      - name: Set fields
        env:
          GITHUB_TOKEN: ${{secrets.PROJECT_TOKEN}}
        run: |
          gh api graphql --header 'GraphQL-Features: projects_next_graphql' -f query='
            mutation (
              $project: ID!
              $item: ID!
              $status_field: ID!
              $status_value: String!
              $date_field: ID!
              $date_value: String!
            ) {
              set_status: updateProjectNextItemField(input: {
                projectId: $project
                itemId: $item
                fieldId: $status_field
                value: $status_value
              }) {
                projectNextItem {
                  id
                  }
              }
              set_date_posted: updateProjectNextItemField(input: {
                projectId: $project
                itemId: $item
                fieldId: $date_field
                value: $date_value
              }) {
                projectNextItem {
                  id
                }
              }
            }' -f project=$PROJECT_ID -f item=$ITEM_ID -f status_field=$STATUS_FIELD_ID -f status_value=${{ env.TODO_OPTION_ID }} -f date_field=$DATE_FIELD_ID -f date_value=$DATE --silent