Hi Ryan
I hope that she has asked for the assessment to be recorded. We always advise people to make their own covert recording. I hope she has support with her on the call.
Have a look at the guide: ESA and UC Claims for Physical, Mental Health and Learning Difficulties: a guide to the work capability assessment.
benefitsandwork.co.uk/guides-for-claimants/esa. There are a list of the sort of questions she will be asked on page 127 onwards - (ignore the questions about travelling to a venue ), but the others will be same.
Make sure she has a copy of what she said on the form.
I hope the assessment goes well for her.
BIS