This is a very strange question … I’m not sure I understand the motive or factual basis behind it.
If you study biology, you will discover that NO ORGANIC creature exerts time, effort and energy without some discrete payoff.
If you want to claim that NPD therapists “manipulate and gaslight” their “victims”, you must explain exactly what benefit or payoff they receive for their efforts.
What we do know about the brain of traumatized people, is that unconscious forces ACTIVELY WORK to preserve homeostasis and avoid disruptive change.
So if your therapists reframes reality, or states a position that you disagree with, your brain is almost certainly going to label this interaction as “gaslighting” and manipulation.
Just because you disagree, does not mean you are being gaslighted … it just means that you and a professional have a difference of opinion.