wxt-8.x-3.011/modules/custom/wxt_ext/wxt_ext_layout/wxt_ext_layout.routing.yml

wxt_ext_layout.settings:
  path: '/admin/config/wxt/wxt_ext_layout'
  defaults:
    _title: WxT Extend Layout
    _form: '\Drupal\wxt_ext_layout\Form\SettingsForm'
  requirements:
    _is_administrator: 'true'
    _custom_access: '\Drupal\wxt_ext_layout\Form\SettingsForm::access'