What is she doing?

Probably meds.
My mother was supposed to have someone round every day to make sure she took her Alzheimer’s medication, but she would hardly ever let them in. Thanks to her shot-to-pieces memory it was, ‘What medication? I’m not on any medication - there’s nothing wrong with me!’

If she’d been a chatty, sociable type, who’d welcome just about anyone, it might have worked, but alas, she was not - they were sent packing!

It was probably about 1 or 2 minutes at the most.Its a pity they don't have time for a chat.

I know someone who used to have a carer in to put in eye drops. For both husband and wife from what I can remember.
He was going blind and wife has dementia.
He used to say a carer came in twice a day for 5 mins.

many visits are only 15 mins long.
I think it is more a check that the person is still alive !
If they are lucky help with dressing or cup of tea.

Perhaps she is supervising meds or some vitals Or just checking she has not disappeared