That's a great question.
Historically, mental health professionals, including psychologists and psychiatrists, practised versions of conversion therapy. Homosexuality was, up until the late 1960s, considered a mental illness. There are some roots of it in the mental health profession, but since that time we've seen a dramatic shift in all of the major bodies of psychologists and psychiatrists saying not only is homosexuality not a mental illness, but there is actually a way forward if we offer sexual and gender minority-affirming counselling approaches. For the most part, those health care professionals and mental health professional bodies are self-regulating and are encouraging their members to offer therapeutic practices that are affirming of sexual and gender minorities.
As for where the practices are happening, it seems to be primarily outside of health care settings in Canada or sometimes across borders. In some cases, people might be sending their children, youth and adolescents to camps in the United States. In all of these cases it's been performed by either health professionals who are largely considered to be operating out of sync with guidelines or by non-health care professionals. In some cases these might be leaders in communities of faith or they might be providers who are no longer respected or licensed.