To save you reading the reddit thread, here are two posts on it that seem to summarise what they discovered:
From https://old.reddit.com/r/askpsychology/comments/jqewhk/does_... :
Criminal justice researcher/licensed California therapist here.
Here is "Patric Gagne's" real personal and professional identify as far as can be gleaned. Her real name is Patricia J Cagle (if anything about her is verifiably real) not Dr. Patricia Gagne. Notably, she did not file a "fictitious business name" in California to operate her clinical practice under a fictitious name. She wrote both her her Modern Love and memoir under a fictitious name and identity. She has conflicting explanations for why her name is "Patric" not Patricia. Clever but deceptive.
She told the highly credulous NYT David Marchese that she she shortened her name to appear more "masculine than feminine." Her actual performer website states that she changed her name to prevent her clients from knowing who she really is. Her acting profile states that her false identity is "so far working:"
"Patric" is also -looking at real information- an Improve theatre performer and claims that she hides her real identity so that her, presumably vulnerable psychotherapy clients, cannot find out anything about her real, private life. Her photos verify the actor and the author are the same woman
She may or may not have graduated from UCLA and received a BA, but records cannot be found. (I have an undergraduate degree from Yale-easily located as are my graduate degrees from University of San Francisco). Her graduate degree, is a PsyD, not a Phd. It was granted from a sketch graduate school in LA. She does appear to have a provider number but not under her name or identity and it may or may not be as a MA counselor or PsyD.
It is critical to state that the REAL Dr. Gagne is a much older, eminent Dr. of Sociology with 72 major peer reviewed articles in gender studies and interesting subjects like motorcyclists. I wrote her to alert her.
Other than Modern Love, I could not find a single reference to any articles, studies or any-general readership article/study/ essay or any evidence of advocacy. Lies.
And, from
https://old.reddit.com/r/askpsychology/comments/jqewhk/does_... :
I don’t see where it says it offered a phd, the website does mention a PsyD program. PsyD is also a psychology doctoral program but based in clinical skills not research and meant to be more of a professional program than academic. A lot of these predatory grad schools did/do PsyD programs instead as they are generally not as competitive as a phd, and are generally paid doctoral degrees as opposed to a phd which is normally funded.
Tantalising. It could be anything from a mostly truthful tale with a few deceptions to preserve the career of phycologist with a difficult personality to almost total bullshit. "Almost" because it would be an excellent example of what psychopathy can deliver.