ezcontent-8.x-dev/modules/ezcontent_block/modules/ezcontent_block_cards/config/update/ezcontent_block_cards_update_8001.yml

core.entity_form_display.block_content.cards.default:
  expected_config:
    content:
      view_mode_selection:
        type: options_select
  update_actions:
    change:
      content:
        view_mode_selection:
          type: fvm_options_select