We are missing:

// data before job log
  stuck: Boolean
  any_runners_online: Boolean,
  no_runners_for_project: Boolean
  tags: Array,
  shared_runners_minutes_used: Boolean
  shared_runners_limit_namespace.shared_runners_minutes: Number|String,
  shared_runners_limit_namespace.actual_shared_runners_minutes_limit: Number|String,
  starts_environment: Boolean
  outdated_deployment: Boolean
  status: String,
  success?: Boolean,
  last_deployment.present?: Boolean
  build.last_deployment.last?: Boolean
  complete?: Boolean
  environment.try(:last_deployment): Boolean
  erased?: Boolean
  erased_by_user?: Boolean
  erased_by_name: String,
  user_path(@build.erased_by): String,
  erased_at: String,
  running?: Boolean
  job_size: Number
  erasable?
  empty_state_illustration: String
  empty_state_illustration_size: Number
  empty_state_title: String,
  empty_state_content: String
  empty_state_action: String,
  retryable?: Boolean,
  artifacts?: Boolean,
  artifacts_expired?: Boolean,
  artifacts_expire_at: Number,
  has_expiring_artifacts?: Boolean
  trigger_request
  trigger_request&.trigger&.short_token
  trigger_variables
  pipeline.stages_count
  pipeline.short_sha
  build.merge_request.to_reference
  build.pipeline.git_commit_title
  pipeline.stages_count
  pipeline.status:
  pipeline.id
  pipeline.ref
  pipeline.legacy_stages: Array,
  HasStatus::ORDERED_STATUSES
    tooltip_message.dup
    stage
    status
    linkToJob
    name
    id
    retried?

  //links
  deployment_link(environment.last_deployment, text: 'latest deployment')
  environment_link_for_build(@build.project, @build)
  project_runners_path(@build.project, anchor: 'js-runners-settings')
  raw_project_job_path(@project, @build)
  terminal_project_job_path(@project, @build)
  keep_project_job_artifacts_path(@project, @build)
  download_project_job_artifacts_path(@project, @build)
  browse_project_job_artifacts_path(@project, @build)
  link_to(@build.pipeline.short_sha, project_commit_path(@project, @build.pipeline.sha))
  merge_request_path(@build.merge_request)
  link_to("#{@build.pipeline.ref}", project_ref_path(@project, @build.pipeline.ref))
  link_to("##{@build.pipeline.id}", project_pipeline_path(@project, @build.pipeline))

we are also missing a new endpoint to populate the dropdown on the sidebar & the stages to show

https://gitlab.com/gitlab-org/gitlab-ce/issues/50101#note_94911317

[
{
 id
 tooltip
 active
 retried
 path
 status
 name
}
]