If you fill in the wrong phone number when you buy an apple, will you send a message to the customer?

No, you can contact the merchant to modify it.

Apple official website's mobile phone number is wrong. You can contact the merchant to modify it. If you find something wrong while waiting for delivery, you can contact the merchant to modify it. Or if the address is wrong, it can be modified. If you modify it after sending it out, the modification may fail. Generally, Apple's mobile phone delivery is slow, so you can contact the merchant to modify it. If you can't modify it, you can apply for a refund and retake it.