Brain scanning techniques and simulation software have a long way to go, but there have been significant advances made:

A full fly connectome: https://www.nature.com/articles/s41684-018-0183-8

Architecture of the Mouse Brain Synaptome: https://www.cell.com/neuron/fulltext/S0896-6273(18)30581-6

So we are past just a simple worm simulation now.