The data migration is still ongoing for parent/child accounts. Though the children's accounts have already migrated, the parents' accounts are still being pulled over.
If you do not hold any other role apart from the parent on VolleyZone, you will receive an activation email for your account as soon as it has been migrated over. Once you have activated your account and log in, you will be able to see your child's account as a second member profile in your account.
However, if you already have a coach, referee, or player membership for the 2022-23 season with the same email address as your child's account in the previous VolleyZone, you should automatically see your child's profile listed as a second member on your account. If you don't, please email volleyzone@volleyballengland.org.