hi
I dont usually comment on these thing but the sanctimonious comments previously posted really annoyed me.
I would give u one piece of really sound advice. Relax, let the physio (however young and spotty he is) get on with his job. she is getting better!
If you listen to some posts you will end up putting your daughter in a wheelchair to protect her from all these big long words!
There is no evidence that any physiotherapeutic intervention works for anterior knee pain or any other condition. As long as she is doing exercises and having regular rest it will probably resolve.
Previous posts have been largely non evidence based: L3 hypomobility!!!! in a 12 yr old gymnast????? i dont think so! as one chap said he is more likely to be hypermobile with a spondylolysthesis. VMO ?? dated theories, there is even a question as to whether VMO really exists! Patellar malalignment? there are no reproducible tests, its impossible to judge! Taping?- massive evidence to show it does nothing to the patellar position, you can try with gaffer tape as evidence shows pain relieves a bit irrelevant of taping used!
Orthotics?? why do you want to put a young developing girl in a pair of ghastly expensive orthotics for the rest of her life when she gets her pain from doing barefoot gymnastics??? Wikipedia reference-linkSacroiliac joint stiffness?? again no evidence it even moves?

Please, please, please, take a step back and dont take all this self important diagnostic rubbish to heart. the only person that can assess your little girl is the person that can see her knee! and it sounds like hes doing a great job so far!