Gently, and with the best of intentions, you’re not any kind of health professional. Bandaging doesn’t add any kind of ‘support’. (Strapping is completely different and a very skilled job) You don’t know if it needs ‘support’ or what the risks and benefits of bandaging at this point are (it’s likely that the risks at this point considerably outweigh any fairly dubious benefits) especially in unskilled hands, so perhaps listen to actual health professionals (who undertook a significant number of years of study and experience) and stop treating her yourself?
I’m really sorry your DD is in pain, but the reality is foot injuries are painful, broken or not. It doesn’t automatically mean anyone is not doing their job properly. Weight bearing and movement are essential for, and actually help proper healing. If people are discouraged by giving crutches, they don’t heal as well long term, even if the first few days are a bit trying. It’s not like DD can’t get to the loo or is weak and frail, is it? Immobilising a joint has very significant drawbacks and is done only when there is clear indications that things will be worse if you don’t. The pain threshold thing is utterly meaningless. There are lots of different kinds of pain, and if you have a deficient sense of some, that doesn’t mean they are all deficient, or uniformly deficient all over. Feet especially have lots of very essential nerves for balance etc and often cause seemingly disproportionate pain, which is why stubbed toes are so unreasonably painful!
‘Ankle’ in anatomical terms includes a considerable part of what most people would call a foot. An x ray isn’t a 6x4 snap, even on centred on the ankle would still include most, if not all, of the foot. It’s likely the red lines denote boundaries, not centres.
I know you are worried about about your DD and I understand. It’s terrible when our children are in pain. But you are assuming skilled and dedicated people are not doing the best they can, and that’s unlikely (although sometimes we all make mistakes) By all means take her back, but starting from the assumption that there is anything else they should, or even can, do is unhelpful. There probably isn’t. We are very used to getting poor service, complaining about it, and then getting something additional. But health isn’t like that. The outcome you have in mind isn’t necessarily the best clinical decision, and health professionals shouldn’t fulfil your uninformed requests (for example bandaging) when there is no clinical indication to.