Show shipping profile in checkout flow always as inline form

I found a custom solution: you need to override CustomerProfile plugin method - shouldRender, so I created CustomCustomerProfile plugin:

class CustomCustomerProfile extends CustomerProfile {

  /**
   * {@inheritDoc}
   */
  protected function shouldRender(array $inline_form, FormStateInterface $form_state) {
    $render = parent::shouldRender($inline_form, $form_state);
    // Do not render inline form on shipping.
    if ($inline_form['#profile_scope'] === 'shipping') {
      return FALSE;
    }
    return $render;
  }
}

return FALSE if you want to get inline form.
And then override plugin's class:

function custom_module_commerce_inline_form_info_alter(array &$inline_form) {
  if (isset($inline_form['customer_profile'])) {
    $inline_form['customer_profile']['class'] = 'Drupal\custom_module\Plugin\Commerce\InlineForm\CustomCustomerProfile';
  }
}

+1 for #5 comment!
thanks for the tip!