Universal Credit Review - limited capability to work

My mum receives universal credit, limited capability to work and has done for several years.
She was contacted through the online journal to say they were doing a review and ask for ID documents and bank statements that have been provided.
She has now received a message notification requesting a call as part of the review.

Does anyone know if they are assessing her disability/eligibility for limited capacity to work or if it’s just to check she’s financially eligible.

She has seen lots in the news about getting disabled people back to work and she is very worried.

Hiya, my son had a phone call once I’d sent the application in, he has autism low level, Asperger type neurodiversity. The lady asked my son if I could speak he Mumbled yes and she took me through some questions, he was awarded Lwrca quite quickly and backdated from the beginning of his UC CLAIM, - she was really helpful and it was just a casual conversation. Since it’s autism it’s hard as he had a pip assessor in 2019 who put him zero for everything - but he does get Lwrca and there rules a lot lot lower than pip. However I’m a member here and I’ve just sent a NEW pip form off using the guide, although the guide and prices does need updating I’ve used prompting, assistance, supervision in EVERY QUESTION and said why! - fingers crossed. It’s just gone, but I’m sure with Lwrca you will be fine, I got a copy of the repost and it’s a couple pages long and very easy, you should be fine xxxx