I found two papers that may help:
https://arxiv.org/ftp/arxiv/papers/2108/2108.13611.pdf
https://www.researchgate.net/publication/330704230_Towards_Detecting_Connectivity_in_EEG_A_Comparative_Study_of_Parameters_of_Effective_Connectivity_Measures_on_Simulated_Data
What do you think?