Predator, Alien(s), and AvP are extremelly messy when it comes down to what’s canon and what’s not.
This can be seen by the interviews of authors of Predator, Aliens, and AvP novels. They often say that, at the time, Fox Century were very loose in terms of drawing a line on what’s canon and what’s not…that’s why in both franchises we’ve got books expanding the so-called lore to “undesirable” ways, one might say.
Even the movies themselves AvP, Fox had quoted them as canon…but also here and there that they are not…
At the end of the day, I believe we should enjoy the materials for what they are: canon, non-canon, the important is to enjoy the stories, etc