It may be that they want you to go to GP, is there specific concerns or just general reassurance?
It's just not the first time i have asked all these questions with the health visitor it's starting to be come a pain. Nursery suggested it as he is on a plan there.
https://www.nhs.uk/conditions/baby/babys-development/height-weight-and-reviews/baby-reviews/ Hold old is your child? The health visitor checks are scheduled at various ages, it’s not as and when you want them. I would find the number for the main hub and ring if you do have any major concerns, or take your child to their GP.