Diagnosis criteria not met for 15 year old

So today had the feedback from rtc provider after 2 years it was very upsetting as we been fighting for years.

My child didn’t get diagnosis for adhd or autism she already has sensory processing, dyspraxia & ODD. They said there was loads of traits but not enough to diagnose. I know it’s the school as she said the school didn’t say anything even though my child is behind has been since primary school she’s very impulsive she is a very good masker! She aims to please as well especially the teachers. She withdraws herself but she fidgets a lot is disorganised forgets things looses things looses concentration easily. She’s has lots of interventions in schoool. She’s on sen plan too. 

Recently she’s been speaking to strangers on the internet putting herself in danger she’s very vulnerable was going to sit in a bus station on her own for 2 hours where bad people are too she has no remorse nothing no understanding. She’s also been speaking to an ai she isn’t your typical 15 year old. There’s no remorse no care no empathy nothing. Just don’t understand as I have autism myself her younger sister does too. I just feel like we have fought for years for her has anyone gone through this & further down the line when they come out of school went into college or whatever they then fight again? The doctors even kept pushing for cahms to assess & they kept sending letters to cahms to push them to look at it all again. I just feel at a loss tbh I knew that school wouldn’t tell the truth they have done this to us many times. She has been through cahms they give diagnosis of ODD.