That does seem to be a separate instance though, so it was never really properly resolved at that stage.
The reason that Anduril was dropped as a sponsor for the 2023 EU conference was that the venue wouldn't allow the association. This time the NA venue did not have that policy, so the sponsorship went through.
https://www.theregister.com/2023/09/08/nixcon_drops_anduril_...
There was also a longer discussion on HN 7 months ago: https://news.ycombinator.com/item?id=37418351