Glad you got the info.
Your girlfriend is lucky to have a compassionate guy looking out for her and her cham.
There are definitely a few problems and, yes, some are nutritional problems.
Using just one type of supplement dust doesn't work with chams.
A young Veiled definitely needs to get plenty of calcium to make his growing body strong.
What happens when the feeders don't get dusted with calcium often enough is that the body steals the calcium out of the bones because it needs the calcium to make all the muscles work--muscles like the heart, digestive tract and tongue, plus the regular muscles for moving around.
There are 3 kinds of supplements that he needs
calcium without D3
calcium with D3
and
Multivitamin powder without D3
The feeders should be dusted on most days with the calcium without D3, then 2x a month with calcium with D3
and 2x a month with multivitamin
Pre-gutloaded crickets usually aren't really very well gutloaded.
You can get some Repashy Bug Burger or some Cricket Crack and gutload the feeders yourself, so they'll be more nutritious.
He is also being kept about 10 degrees too hot for such a youngster.
He should be kept at 85 in his basking spot.
You can take the red bulb out and just put a regular 60 watt lightbulb in its place to lower the temp down to the mid 80s.
This forum Veiled caresheet
https://www.chameleonforums.com/care/caresheets/veiled/ has plenty of great info and there is so much more good info linked on that page.
The way his casque looks , he is probably about midway in his MBD, right before the bones start deforming badly.
It is very treatable but, you need to follow the treatment and not think that if a little is good then more must be better--because it isn't and can do worse damage
MBD is reasonably easy to treat and if you know a good vet who knows how to treat chameleons, he can get a calcium injection to boost his calcium levels immediately.
Here is an excellent post by a vet, who also happens to be a chamkeeper, about MBD and how it's treated with calcium syrup
https://www.chameleonforums.com/what-metabolic-bone-disease-mbd-looks-like-how-happens-how-fix-95071/
Oh and welcome to the forum!