Paywall, https://www.sciencedirect.com/science/article/abs/pii/S0033318220301560 Sci hub, https://sci-hub.tw/10.1016/j.psym.2020.05.016
I found the paper difficult to understand, though it did not seem to be deliberately obscure like some of the BPS stuff, so I could be wrong in my interpretation. They seem to assume conversion disorder when a biological interpretation is just as likely to be correct. All their findings are taken as proof of the reality of hysteria rather than proof of a biological fault. Damage to the stress responsive parts of the brain so the system does not work properly does not mean that changing your thoughts is relevant. Take ulcers. My mother was told she had a nervous stomach after a life threatening bleed from her ulcer. For years she had to watch what she ate and try to stay calm. They were not wrong - oranges made her ulcer worse and stress did too but it turned out that a bacteria made her stomach not work properly. After a course of antibiotics she could eat as many oranges as she liked and get seriously stressed without any stomach pain.