Depending on what country you live in, in addition to getting your mother PT, she also needs some assistance at home, making her home safe, preparing meals, bathing and toileting, etc.
Is she still in the hospital or home now? If she is home and you are in the US, a social worker or case worker can arrange for her to go to an assisted living center for rehab. Once you go home, this cannot be done unless you are admitted again per Medicare rules. Then to set up services on your own costs a lot of money (usually out of pocket).
If she is aleady home, then contact a local VNA (visiting nurses association) and have a nurse see her once a week and a HHA (aide) assist her with her daily activities, but family will need to pitch in and help as well. If you like the HHA, request that she be the one coming every time.
Get her name on a waiting list with a nursing home now before you have a crisis. There is never a good time to talk about an Advance Directive and Power of Attorney (POA), but this also needs to be done at some point prior to her deteriorating. You need to be realistic. You family needs to sit down with your mother and sit down to disuss this in a calm manner at the right time.
You could ask a neurologist about a referral for physical rehabilitation.
Sometimes such as after a stroke the area of the brain affected can regain
partial functioning or other areas of the brain compensate for it. Also in a standard physical sense a person can help stabilize and strengthen functioning with balance and coordination. A physician and rehabilitation specialist would be able to inform you of the clinical specifics of this.