If I had a dollar for overtime I hear someone being told by a parent or partner that they can't be transgender as they have never shown any signs before, I could fund this site, buy a home for transkids to live freely and fund my bright pink Ferrari

We are experts in hiding.
I have a client who was an SAS soldier, one of the toughest, aggressive and masculine forces in the world. She hid her identity even from them, their psychologists and trainers and comrades. After two tours of Afghanistan she transitioned. She was always a woman, she went into the SAS so she could die. She didn't.
An unbelievably brave and reckless woman who received high Honours for protecting her comrades under fire. I asked her; Why? 'Because I didn't want anyone to know I was transgender and I didn't care if I lived or not.'
We can hide ourselves so well that people don't believe us.
Ask your therapist if they are experienced in gender issues, whether they follow the WPATH guidelines (available from
www.path.org SOC7) Print them out, read them, ask the therapist if they have read them and if they follow them.
Your therapist is there for you, not to line their pocket. A good therapist is worth their weight in gold. A bad therapist is useless.
Yes a therapist needs to find out if you have DID (rare), bipolar (not uncommon) and no problem just needs treating, autistic (not uncommon) just needs treating, psychotic, PTSD (common).
None of these except DID prevent transitioning, they just need a proper management plan. The purpose of the management plan is to help you be you and a happy you.