My assumption is that she hasn’t directly had patients in Tennessee much, especially since starting Weigh Down. This assumption is based on the way she always tells her backstory, in which she makes it sound like most of her direct patients before starting Weigh Down were in very poor communities in Mississippi.
The way she seems to function nowadays seems to be by giving advice en masse indirectly through Weigh Down without ever having a direct practitioner-patient relationship with anyone...and with occasional fine print reminding people to check with their actual doctor. In this way, Gwen is more similar to Dr. Oz than to Dr. Bob Sears. Bob Sears was maintaining direct relationships with patients, so when the CA medical board received complaints about him, they could look into his records and find direct patients who were put at risk by his substandard medical advice with regard to vaccines. Meanwhile, Dr. Oz rarely sees patients directly anymore and isnt selling those patients the bullshit/potentially harmful stuff he sells to other people through his indirect advice on TV. Professional guidelines and malpractice laws vary but often are outdated when dealing with problems that arise in our current age of mass media.