Verification code not accepted when creating child apple id
I'm trying to create a child apple ID on a factory reset iPad. I get to the step where I need to enter a verification code. I get the code notification on my iPhone which is a 6 digit code. I put that code in and it's not accepted. A red arrow appears to the right of the input code when I select the next button. I've resent the code several times and each time I input the new code. Each time it's not accepted. One thing I notice is that the next button lights up as soon as I type in 4 digits. So maybe I'm entering the wrong code?
iPad Air Wi-Fi