Sharing product details (CAD drawings, other files, or early pre-production models) is quite normal. Despite Apple's best efforts, most of the iPhone leaks are from the makers of cases, screen protectors and other accessories (e.g. the elimination of the notch from the iPhone 14 Pro was inferred from the design of the screen protectors that leaked well in advance of the launch).
Another recent example, DxO PhotoLab supported the R8 before it was in my hands (and I got one from the first allocation to B&H), so clearly they had the RAW files in advance. Not sure how long that's been the case, but for previous camera purchases I had to use DPP for a couple of months until DxO started supporting the camera and lens combos.
