This isn't a particularly accurate summary of what's been done here! Firstly, C. elegans has 302 neurons (in the adult hermaphrodite). Secondly, which work were you thinking of? Lanza et al. (2021) has 126 neurons in its model, which is kind of like 132? I don't know of anything that convincingly models anything like a decent fraction of C. elegans behavior, though there's some nice work on modeling the simpler aspects of locomotion--Lanza has a decent account (not verified with calcium imaging or other functional techniques) of some aspects of escape behavior, for instance.

Oh, and neuropeptides. Nobody does neuropeptides comprehensively. We don't even know what they all do or where they are, just that there are a lot of them and they're sometimes important.

So I don't think we can put C. elegans into the "done that!" box yet in any remotely satisfying way.