I went to do a little digging since people have pointed out that the NijiEN figurines do not list a manufacturer like most other figures would list a company like Kotobukiya or Goodsmile.
MyFigureCollection lists
196 Nijisanji figures (some of these are not licensed/doujin works), of these Anycolor is listed as the manufacturer of
only 5, the ones of NijiEN. However, they do also all list the creatives behind the designs (except the Elira one for some reason) and they seem like pretty capable people. All figures list what appears to be some artists collective that has put out some nice looking figures. Some of them also list secondary sculptors and they all look pretty prolific, and I can say that with certainty for Alban's sculptor because I own several of those figures.
The main question is obviously what "Anycolor" as a figure manufacturer means. I think what's most likely is that they are just cutting out the middle man and using the same factories they usually would, keeping the cut that would normally go to the production company. I wonder if this is a tryout and might become the norm in the future for Nijisanji scale figures.
It makes a lot of sense to, at some point, start building your own "merch supply line" even for the premium merch to pump up margins. They also mentioned in the M&A section of the investors Q&A that potential targets for acquisitions could be companies that "can acquire IP pipelines and have the functions to grow and monetize IP", which something like this would fit into.