Q: how to change id apple region

You possibly can't, unless you contact iTunes Support and they can do something, asking for card details is a way of checking that you have a valid billing address in that country : Why can’t I select None when I edit my Apple ID payment information? - Apple Support

When you change the country or region of an existing Apple ID, you must provide a payment method and update your billing options. If you want to remove your payment method after you change the country or region, you can change your payment information to None.