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

crm_core_user_sync.rule.new:
  route_name: crm_core_user_sync.rule.new
  title: Add new synchronization rule
  weight: 1
  appears_on:
    - crm_core_user_sync.config

crm_core_user_sync.add:
  route_name: entity.crm_core_user_sync_relation.add_form
  title: 'Add relation'
  appears_on:
    - entity.crm_core_user_sync_relation.collection
    - view.contact_to_user_management.page_1
    - view.user_to_contact_management.page_1