Can you get kicked out of Assisted living?

In my experience if a resident in assisted living doesn't do certain things, like not showering for a certain period of time, can't walk (or ambulate), won't or can't listen to direction (like for a fire drill), then the facility can ask them to leave. I don't know if this is law or particular facility policy but depending on the situation it is possible, at least in the facilities I am familiar with.

Being asked to leave AL usually involves the person needing a higher level of care than that able to be provided in AL. Looking at the ADLs (Activities of Daily Living), can the person independently feed themselves, perform toileting safely, transfer independently or with a light assist/supervision? Can they follow general instructions from staff? Using a wheelchair isn’t a deal-breaker.
Behavior can also be a reason- such as belligerent, aggressive, and/or inappropriate sexual behavior. AL is congregate living, so the facility will intervene if fellow residents are upset by behaviors, usually by first referring the person to psychiatric nursing home care or to a short-term inpatient setting for medication management.
Believe me, the facility will do its best to work with the resident and their family to problem-solve how/when to address issues.

Is she in a Memory Care AL? Regular AL often isn’t equipped to provide the specialized care that Memory Care does. When the deficits are too great, you’ll likely be told that.

When my cousin wheeled herself out to the parking lot and tried to get into the car with a stranger, it was too much. We had the choice to privately hire a person to be with her around the clock or move her to a secure Memory Care facility. That AL didn’t have one. The move was great and immediately, she seemed more relaxed than I had seen her in months. She seemed to sense she was in good hands and she no longer resisted care. Just a whole different environment.

So, I wouldn’t take it as a negative thing if she’s asked to leave.

Yes. If a resident isn’t safe at that level of care, or noncompliant, they very likely require a higher level of care or supervision than an assisted living can provide. My mom was diagnosed n AL for about 2 years and then needed to be moved to memory care. Safety is a big issue that often requires a move to a level with greater assistance and supervision. Big difference between assisted living and memory care for my mom was that memory care was designed so that residents could not go outside.