PIP Appeal help

I can see that it was a physiotherapist that did my initial phone assessment that lasted for 20 minute's. Could I make reference to the fact that a physiotherapist health care professional has no knowledge on how my health condition affects my day to day activities and do not feel like as he is the right type of qualified person to examine me. Hence why I feel the report provided by him had inaccuracies and not a clear understanding of how my disability affects me.
Or does this sound like I’m attacking the HCP?

Thanks Gary. My diagnosis is not rare however what I was left with post surgery is not common and I have not met another person physically who has gone through what I have. I would mention it here for more insight but not sure if this is right platform to talk about my personal medical history.
I feel as if the HCP mentioned my initial diagnosis when I was 13 and just used that as the base line to write his whole report. How long can my rebuttal be? Or should I be keeping it short and concise?

At the time of the claim I did not have a formal mental health diagnosis, but I mentioned I do suffer from lack of motivation and days where I’m not able to do anything because of my low moods. Since the time of the claim to the appeal I’ve gotten the help and diagnosis shortly after I claimed. Now I’m aware you do not need a formal medical diagnosis for PIP but rather how the condition affects you on your day to day. Am I able to send my formal diagnosis as sub evidence to counter what the assessor had said about me?

In addition to my question regarding not having a formal diagnosis. I note that on the PIP guide part 2 on the Gov website it states:
2.1.12 If there is evidence that someone is awaiting treatment or further intervention HPs should take into account the facts and likely impact of that future treatment regime as they’re evidenced at the date of the assessment, as part of their consideration of whether the person will meet the prospective part of the required period condition.
I mentioned to the assessor that I am awaiting further treatment, and it was from there after I was set up with a dietician to help with my eating disorders and was given help for my mental health conditions. Am I able to link this back to the claim based on what I found on the Gov guide for PIP and telling the HP that I was awaiting further treatment?
Also side note, really sorry guys I most likely will be bombarding you all with questions for days, really appreciate the help!