I think it's actually insulting to them as government funded scientists to imply it.
The most likely reasons for them not publishing is that they don't yet have enough data to meet their internal review bar for going to publication and unlike the other people, have little to no interest in trashing their reputation by inflated early claims or leaks. The second most likely reason is they have unclear results and so are seeking internal replication. If they have anything interesting to communicate about work in progress they will do it scientist-to-scientist, not in public.
Here is where they publish their IPR
https://www.anl.gov/topic/business/intellectual-property
TL;DR the pace of reporting in this space is stupid. Normal science publishing speed is slower than twitter, for good reasons.