Here is an interesting study that came out. I would say it is not groundbreaking but it is affirming. It is on the observed prevalence of FND in chronic pain clinics: https://pubmed.ncbi.nlm.nih.gov/37227931/
Another study occurred a while back that looked at the high prevalence of autism and autistic traits in FND. When we bring it around full circle, we can see how there is a high rate of abuse/childhood trauma in children with autism especially with a lack of appropriate follow up by adults. The interconnectedness of common context can be such an interesting thing.