I have a DS(9) in French primaire with ASD, dyspraxia and dyslexia. I've had to jump through hoops and it took a good couple of years and lots of tears, but once the school came on board we're snowed under with help. In fact he's had so much offered to him that we've had to turn one organisation down because he simply can't fit it all in and that's just what's been organised externally to help him with school and social skills. He also has in own support worker 1 to 1 for nine hours a week in class.
In school they also have a special assistant to help the kids who are struggling, so for two years she spent an extra 30 mins twice a week helping DS get to grips with his reading, writing and dyslexia.
There are about 10 children in the DC's school with more complex SEN than my DS and they can't cope in the classroom environment, these children have been put into the CLIS class where they are in a more controlled, calmer environment and the work is adapted to their needs.
As I say it was very difficult and frustrating getting a diagnosis and help, but to be honest once the school approached me and told me there was a problem they really got the ball rolling and now DS has gone from struggling to the top of his class in just one academic year.
However, until you have a diagnosis that the school believe and has been presented to them you'll get nowhere and in fact my my DS' teacher spent a whole year telling me how rubbish he was when she knew he was in the process of receiving a diagnosis - she made his life hell too. Even though I had a diagnosis of dyspraxia from the UK from before our living in France days the school disregarded it until we had something down in French from a psychomotricienne.
I think your best bet might be to approach the school and get the educational psychologist on board straight away.
I don't know if it makes any difference but my DC's are educated in an ecole privee, I don't know what it's like an ecole publique.
PM if you need any more info.