Gitlab community pull request setings

Hi guys
We are have gitlab community version (13.8.1) in own server

Problem:
How can i:

  1. After pull request send notification to all members to approve
  2. Automaticly merge branch to master after aproove by 2 any peoples

can i setup it in community version of gitlab?

PS
docs doesnt helpfull. Havent crucial settings
https://docs.gitlab.com/ee/user/project/merge_requests/merge_request_approvals.html