Forgive me highlighting this post, but it is an excellent example of misunderstanding this benefit.
It is not awarded based on the condition, it is based on the impact of said condition.
It wasn't uncommon for people to say, well, my BIL gets it for back pain but I didn't get an award for the same.
That doesn't mean you weren't believed. It reflects the other person's circumstances and it is unlikely you know exactly what your BIL said. I'd advise against comparing.
Someone mentioned that some GPs decline to do a report for them, citing that the DWP will be in touch if needed.
I am not giving advice here, but I personally would not bother to ask. Your GP knows you as their patient. An average report might read "Ms X has A,B,C condition which are treated with DEF medication and age had physio last year".
It's up to you to decide whether that's worth £50 or so to get it done.
Though I have just thought of something actually. If you have a carer or support worker and you would like them to be contacted them, please put their details in.
I find support workers WAY more valuable than GPs or consultants.
How it goes well OP.