Her grip looks weak from the picture and you may be missing the egg laying time - she could be going into eggbinding.
Dig a hole for her in the sand and see if she will use it. I've had this work before.
She looks healthy from the pictures. You can avoid a female laying eggs by keeping them slightly cooler and feeding slightly less. I don't completely understand how this is achieved. I wouldn't be worried if I were you. When you see the receptive colours come through then get ready.
Ambanjas generally do not commonly display blues like this. I know there are some people working with some seriously blue ambanjas in the U.S but they don't really look like this.
I'm actually going to throw in a curve ball and say you have a true blue Nosy Be. Not an ambanja, nor an ambilobe...
It is definitely a female and if she is digging in the dirt it is to lay an infertile clutch. You need to make sure she has a laying bucket. Do a search on the forum to do what is needed.
How old is she? You will see receptive colours before she lays eggs. And in these pictures she does not have mature female/receptive colouration. You should see the orange and blue spots come around 6 to 12 months age.
Lennon could be right on the fact that she has not adjusted to the new environment yet.
But there is a big possibility that she is gravid. Carpet chameleons, like Panthers, can retain sperm and lay multiple clutches (maybe up to 3 is what I've heard?) from a single mating. Don't miss the signs...
You already have your own answers. She is unreceptive. You cannot force the female into receptivity by introducing males continuously.
Leave her alone until she visually shows you receptive colours. Then introduce a male. You should see receptive colouration at some point without needing to...
You have to try and find a more reliable vet. The fact you can't see him/her until June 11 is rubbish.
Post some more clear pictures of his mouth from different sides. His mouth does look a little puckered up towards the chin but I don't know what that could be caused from or if it is a...
Jpf about the black marks. When chameleons are scratched or rub against things they may form black marks which I believe to be some sort of bruising of the skin. It is likely the chameleon rubbed it's nose against the mesh or even on a branch.
There are several things that don't seem right...
Nosy falys generally have a lot more white and also the red speckles that cover the body (called redrain by some, I think). Ambanja and nosy faly can sometimes look very similar. Especially if there is more green or blue in a faly rather than white. But to a beginner it might be a bit difficult...
Presumptuous might not be the correct word. But I think we are just running around in circles now. I think the OP knows well enough by now that the cage is not going to work for the chameleon and many options (including that for substrate) have been offered as the correct alternative.
Yes as a bioactive substrate. Which in this case it is absolutely not. I didn't once completely rule out substrate. Just that in this case, substrate might not be the best idea. Also the OP mentioned that point of the substrate was for egg laying - which is what I actually commented on ;) I have...