Thank you for sharing your mum’s story. I’m sorry she is so unwell, and I remember you saying some time ago that she was not making the progress you’d want.
The one thought I’ve got to offer you is a film that was shown on BBC a few years ago about Richard Gray, a former soldier, who had a stroke and his recovery from it. There is a recording of it available here: My Amazing Brain
I don’t know how long Richard’s first stage of recovery took but overall, the film shows his recovery over 3 or 4 years. And my reading of the film is that in his case, it was his cranioplasty that led to him starting to recover.
I hope this might be a useful film to show you a real example of how long it takes but also how much better Richard is by the end.
*It is difficult to watch but I hope useful, helpful.
Sending you both lots of love,
Richard