No, we don't yet know what's happening in that area: as the DARPA 2022 report puts it in a press release entitled 'Solid State verification of nuclear particles in electrochemical cells'. "Work should continue - much interesting science to be done. Results do not yet rise to level publishable in peer-reviewed physics journals". Bottom line: some neutrons appear and they cannot explain the mechanism. If neutrons are detected and it's definitely 'cold' then what would you call it?

There are many other reports more or less with the same proviso. 'Not yet publishable'. Many will wonder about the 'yet' but that's usually the case with potentially new areas of science.

https://doi.org/10.1063/5.0153487 Li–Pd–Rh-D2O electrochemistry experiments at elevated voltage