Difficulty engaging with others enough for PIP?

Hi all. My PIP claim form finally came just over a week ago. There's a bit on it that says any evidence that will be sent doesn't have to be recent....Is this right? I suffer from schizophrenia and am going to enclose evidence that is "recent" and some that is not so recent.
I have difficulties mixing with others and I'm even wary of my neighbours...And I rarely socialise. Does anyone in here have similar difficulties to me? Just wondering what my chances are on getting PIP? As I've no mobility issues whatsoever.

Thanks

Hi I have something similar and scored points in things like

prompting / support for Socialising, Preparing food, Washing and Dressing and
Budgeting. I also mentioned side effects of meds

also might possibly score on planning and following journeys if it cases you
psychological distress (mobility part)

I'm in a similar situation. I have an autism spectrum disorder and a string of anxiety disorders. I've put in a PIP claim mainly on the grounds of difficulties in mixing with others and difficulties in communicating.The face-to-face assessment was awful. In the decision letter, I was awarded no points anywhere and no benefits. I've now sent a request for mandatory reconsideration. It is all very stressful.