Assuming she’s paid her National Insurance contributions, she’d get the maximum £151.97 a week.
As social media is her primary job, Anna would only be allowed to work on the 10 ‘Keep in Touch’ days - any more and she would lose the right to MA. KIT days are also taken in whole days, even if the work she did only took a couple of hours.
With 10 days she could easily record a couple of videos a day and take photos to post, then get Mark to edit and post videos. But maybe she’s enjoying the time with the baby (and the cynical side of me thinks she’s never done that much work in a day pre-baby)