It was from a paper from Deep Mind in 2018, Ganelo et al.

I don’t know if neural processes were superceeded, but I have used them in work before successfully. I think there are other approaches to combining ideas from GPs with neural networks, not sure what the state of things is right now.

Last I checked there was a family of similar models so you should look there, particularly around the few shot / meta-learning problems that neural processes were created for.