That's good news.
Does mum own or rent her home?
If you don't have Power of Attorney, apply to the DWP to become mum's DWP "appointee". Then you can manage mum's benefits on her behalf. Don't let the council do this instead of you.
If she rents it and goes into care, the home will need to be cleared.
If she owns it, the value if the home will be considered. If you were hoping to move there one day, then it is in your best interests for mum to stay there as long as possible with increasing amounts of care. If she is considered eligible for Continuing Healthcare funding, then as that is an NHS service they do not charge for their services or consider the value of the house.