Will the custom checkout fields be saved in the database if I have only overridden the LayoutProcessor class?

I added new fields to checkout form by overwriting LayoutProcessor.php file.
Something like this:

['shippingAddress']['children']['shipping-address-fieldset']['children']['regulation'] = [
    'component' => 'Magento_Ui/js/form/element/abstract',
    'config' => [
        'customScope' => 'shippingAddress',
        'template' => 'ui/form/field',
        'elementTmpl' => 'ui/form/element/checkbox',
        'options' => [],
        'id' => 'regulation'
    'dataScope' => 'shippingAddress.regulation',
    'label' => '',
    'provider' => 'checkoutProvider',
    'visible' => true,
    'validation' => [
        'required-entry' => true,
    'sortOrder' => 250,
    'id' => 'regulation',
    'description' => __('Regulations')

Field in form is properly added, but my question is where data from this fields are stored in database? In which tables?

Thanks for help in advance.


A post was split to a new topic: How to store a custom checkout field in the database?

2 posts were merged into an existing topic: How to override a checkout block?