And what has been done about all these broken bones. That is not normal. MG can make you fatigued, but is unlikely to cause broken bones.

Asthma, does she actually have asthma, or have the doctors simply taken the short easy route of prescribing inhalers. I am concerned because you said steroid inhalers, that added to predisolone, one has to wonder if, especially with a child, an overuse of steroids is causing the bone issues.

I am assuming and hoping that her paediatric consultant has investigated and considered all of these factors. But you never know.