They have to clean up their own cuts and scrapes but if they can't you will be called to collect your child and clean them up yourself at home.
The vast majority of playground injuries at our school are minor scrapes and grazes with little or no bleeding involved. Cleaning them up is often a case of putting hands under a running tap or giving the child a wet paper towel to put on their knee for a minute. It's not often that anyone needs a plaster.
For the more serious injuries (bumps to the head, more than minor bleeding) we would usually contact parents anyway to let them know what had happened.
The new policy may say to call parents in etc but realistically no first aider is going to stand by and watch an injured child bleed or otherwise be in pain and do nothing about it while they are waiting for someone to turn up.
The worst of the scrapes tend to be on the knees of girls with bare legs, so one way to reduce the chances of injury would be to either send your DD in trousers or make sure she has tights on. In winter it helps if children are wearing gloves or mittens.
Food sharing has always been a definite no-no. Some children will have food allergies. Some will be vegetarian or unable to eat particular foods because of religious reasons. Others have to have their food intake carefully monitored due to medical conditions eg diabetes.
It upsets me to think of her being told off for going near friends.
Even before the summer holidays, when we had children in smaller bubbles with stricter rules, no one was told off for getting too close. Instead they would be told (very nicely!) to just remember to keep their distance. It will take time for everyone (staff and children) to get used to the new rules.