The cardinal symptom is gait. Walking with shuffling is the main indicator, and that starts at a time when you still have a decade or two to live. Most Parkinsons patients die of something else, or falls.
But I know Parkinsons, tragically, twice, and have seen other Parkinsons patients from time to time. I know the early and late stages. She lacks most of the early stage symptoms especially the shuffling gait.
It is possible she has Parkinsons and is on some new med and/or attached to a brain stimulation electrical device. There are new things now other than the dopamine replacement therapy. I can say for sure she does not have the dopamine overdose symptoms or the classic early Parkinsons symptoms. Under care Parkinsons patients can live for decades and die of something else, or they can fall and deteriorate from inactivity.