Yes, I think maybe what you are remembering is the Summit trial by Daisy Singla, Simone Vigod and others.
I'm not super familiar with it, but they were training non-professionals to be sort of like therapists in certain situations in the postpartum and it worked very well. The trial results are released already. There will be more big announcements about it, but it does seem to be a low-cost, effective tool that can be used.