Attendance allowance claim rejected

Hi I am wondering if anyone could help me with any experience they have encountered from a rejected attendance allowance application. I completed the online application 6 weeks ago for my mother who has severe depression and anxiety. Both of these conditions have a great impact on her day to day living and she heavily relies on others to oversee her or provide support and or reassurance in a lot of her daily activities. I am certain she firs the criteria for care needs in the day and we got a letter today to say the Attendence Allowance was rejected on the basis “you must have a disability which means you need right throughout the day frequent attention with your bodily functions, or continual supervision to avoid substantial danger to yourself or others”. Am I right in thinking that they don’t consider her disability to a be a disability that impacts her daily living? Has anyone experienced this with regards to mental health issues and what is a good format of mandatory reconsideration as I will be writing one for her because I’m really disappointed that they seemingly don’t understand that she is incapable of doing a lot of daily tasks by herself. Any advice would be appreciated- thanks 🙏