PP who haven't used a squat toilet in Morocco, haven't even seen one there, cool.
But other posters have. And they're not describing pristine porcelain.
So now, imagine you've got your period. You're away from home. You're 11-13.
Or
You've got horrific food poisoning and peeing poo.
Now go and squat, don't slip in the "liquid" if it's wet, or the sludge if it's not.
Toilet paper not there as you use then wash your hands.
I mean exactly how graphic does it have to be before you say, "Ok, not ok for my child".
Even clean squat toilets are uncomfortable experiences for anybody not used to squatting. Add in all the other things that go with them, then add the "bonus" experiences for females, in backwater areas, and why on earth would you want your tween DD to go through this?
And I agree that toilets shouldn't be an issue in Morocco and I don't think that it's a given that they will be. However, a bus loads of kids in a country where at least one of them is likely to get a stomach bug, coupled with a bus journey to and fro a rural area and it's a very high likelihood.
I'd say if you want your DD to experience Morocco, then take her there yourself. It's a great place. I haven't been with my kids, but I would take them. Not for a school trip though.