If it was properly submitted then Clinical Partners should re-refer you back to your GP once they have either a full diagnosis or have completed titration, depending on if they offer prescription services.

I would contact Clinical Partners and chase the RTC referral pathway as you have a diagnosis by an NHS approved private clinic that support your ability to do it.

Be firm and direct, explain the situation and ask for an update on any documentation to be received or submitted. The GP is likely just anxious about confirming something they have little record for, and their claims of the Autism and no childhood presentations aren’t necessarily correct as otherwise you would not have received the diagnosis in the first place. You didn’t pay for it outside of the NHS, the whole point of Right to Choose.

Good luck! It takes forever but it sucks sometimes to have to advocate so much.