Intriguing concept
AFAIK, the concept here is unique although a similar idea was used in an older Denzel Washington movie called Fallen about a demon that can body hop via touch.
I thought this movie was sort of timely too. I'm an older white guy -- one of THOSE people -- and I struggle with the concept of gender dysphoria. It seems like the latest 'trendy' First World mental health problem.
I remember back in the 90s when ADD was the trendy mental health disease of the decade. Every overactive kid was promptly labeled ADD and medicated. (Speaking from personal experience here with one of our sons...)
Anyway, this movie did give me pause for thought... at one point she asks A if A considers themself a male or a female. A jumps between female and male bodies and responds that s/he isn't sure what s/he is.
I thought: "That would be a weird experience... to have a consciousness not connected to a particular sex." Maybe the film makers had a larger point to make with this movie, IDK?