drupal/core/modules/entity/entity.local_tasks.yml

entity.view_mode_edit:
  title: 'Edit'
  route_name: entity.view_mode_edit
  tab_root_id: entity.view_mode_edit

entity.form_mode_edit:
  title: 'Edit'
  route_name: entity.form_mode_edit
  tab_root_id: entity.form_mode_edit