If you take a small look at your list, it includes nothing from the Predator franchise, nor the AVP franchise. AVP was never canon of the "Alien" series in the first place. I think you may be too focused on Alien specific canon and forgot that the mod we're developing is Aliens Vs Predator. As long as I have any say in it, and as long as Fox doesn't declare it non-canon, the 2010 Aliens Vs Predator game will not be dismissed. This is something not even Ridley Scott can say otherwise about.
Yes, its just the book only focuses on the Alien aspect, so it mostly relates to the alien-exclusive side of things, since its written with an in-universe perspective of someone who used to research xenos and similar, so from that, of course they wouldn't mention preds, since its not the "researcher's" area of expertise. Apparently they (as in FOX themselves) do consider the predator to exist in the same universe, with them being subtly teased when you input "predator" into the MUTHUR thing that used to be on the official Alien website. It said like "higher clearance required" instead of the generic "no information known" for any "invalid" inputs. Though technically the book mentioned Fire and Stone, which does have both an Alien, a Predator, an AvP, and a Prometheus chapter, so there's that much. As for not going to in-detail with the predator stuff, I'm assuming its since the (real) writer didn't know if The Predator was gonna retcon anything or not, so he wanted to just be safe and not mentioned it much, outside of FnS.
Its just that it didn't mentioned AvP 2010, since its kinda in that nebulous stage, since it may relate too much to the "predator" side of things, too much for the "researcher" to mention it. For example, biology uses chemistry, but you wouldn't expect a biologist to super well-vised in chemistry.
But as far as AvP 2010 goes, we already added the few unique things is showed off, such as the cryotubes, combat synths, lasermines, and the preatorian. The rest is stuff that has already existed before in one of the series. And I'm not counting the structures, for obvious reasons.