crm_core-8.x-3.x-dev/modules/crm_core_match/crm_core_match.links.action.yml

entity.crm_core_match.add_form:
  route_name: entity.crm_core_match.add_form
  title: 'Add Matcher'
  weight: 1
  appears_on:
    - entity.crm_core_match.collection