I assume not - although if you take a look at any of the big online tutor platforms there are masses that cater for degree level.
With A levels being so competitive now, why on earth wouldn't you do the extra to help ensure those top grades?
Even better if you can also benefit from a contextual offer.
Loads of parents do state plus - outstanding comp and add on the extra curriculars and tutors. It was very much our calculation when deciding which secondary to pick.
It will become an even more popular choice now so many parents are priced out of private schools.
ETA: I suspect you might be surprised how many of your DC's peer group had tutors. I was truly astonished at the scale when I said I was looking for one for a particular subject. Nobody was saying it out loud so everyone will assume their children weren't - there was just illicit passing of the contact details...