I'm not sure, my intuition might be wrong.

I looked into this paper and expected Gaussian processes with complex kernel functions.

Giovanni Petri (author of paper here):

https://twitter.com/lordgrilo/status/1506294750621716482 ->

Networks beyond pairwise interactions: Structure and dynamics https://reader.elsevier.com/reader/sd/pii/S0370157320302489?... ->

Multiscale Information Decomposition: Exact Computation for Multivariate Gaussian Processes https://www.mdpi.com/1099-4300/19/8/408