Holding a CircleCI workflow for a manual approval - https://github.com/idugalic/spring-boot-webpack-es6-react-poc/blob/master/.circleci/config.yml

config.yml

defaults: &defaults
  working_directory: /home/circleci/kotlin-spring-boot-reactjs-poc
  docker:
    - image: circleci/openjdk:8-jdk-browsers
    
version: 2
jobs:
  build:
    <<: *defaults
    steps:

      - checkout

      - restore_cache:
          key: kotlin-spring-boot-reactjs-poc-{{ checksum "pom.xml" }}

      - run: mvn dependency:go-offline

      - save_cache:
          paths:
            - ~/.m2
          key: kotlin-spring-boot-reactjs-poc-{{ checksum "pom.xml" }}

      - run: mvn package
    
      - store_test_results:
          path: target/surefire-reports/
          
      - run: rm -rf target/classes/
      - run: rm -rf target/node/
      - run: rm -rf target/maven-archiver/

      - store_artifacts:
          path: target/
          
      - persist_to_workspace:
          root: target/
          paths:
            - .
 
  staging:
    <<: *defaults
    steps:
      - attach_workspace:
          at: workspace/
          
      - run: ls -la workspace/
      
  staging-e2e:
    <<: *defaults
    steps:
      - attach_workspace:
          at: workspace/
          
      - run: ls -la workspace/
      
  production:
    <<: *defaults
    steps:
      - attach_workspace:
          at: workspace/
          
      - run: ls -la workspace/

workflows:
  version: 2

  continuous-delivery-workflow:
    jobs:
      - build
      - staging:
          requires:
            - build
          filters:
            branches:
              only: master
      - staging-e2e:
          requires:
            - staging
          filters:
            branches:
              only: master
      - approve-production:
          type: approval
          requires:
            - staging-e2e
          filters:
            branches:
              only: master
      - production:
          requires:
            - approve-production
          filters:
            branches:
              only: master

Sorry for my question, I have a confuse here. This workflow you run is only master branch. So If I have 2 branches ( dev and prd), I update code to dev branch, run build-dev then create a approval for deploy to production. The build-prd job I run in prd branch. When i run this workflow, after approved, I can not see build-prd job on this?