Jenkins delivery pipeline view -how to add manual trigger(play button)?

Question

I am trying to connect/achieve below things:

• Pipeline having job with multiple stages and tasks
• Configure above pipeline with Delivery view plugin
• Last task of last stage is to deploy to production [caution: want this task with manual trigger]

Jenkins version: 2.222.x

Things I tried

node {
  stage 'Build'
  task 'Compile'
  echo 'Compiling'
  sleep 1

  task 'Unit test'
  sleep 1

  stage 'Test'
  task 'Component tests'
  echo 'Running component tests'
  sleep 1

  task 'Integration tests'
  echo 'Running component tests'
  sleep 1

  stage 'Deploy'
  task 'Deploy to UAT'
  echo 'Deploy to UAT environment'
  sleep 1

  task 'Deploy to production'
  echo 'Deploy to production, but wanted with manual trigger'
  sleep 1
}

Below is the desired configuration which I am looking. desired configuration, delivery pipeline plugin wiki

I could able to achieve that manual trigger by creating multiple free style jobs with upstream and downstream configuration and for the manual step I can set post build job with manual trigger. But that is something which I want in pipeline because there we have task (inside stage also we can do separate vertical tasks)feature.

Please help me and suggest how to achieve this.