There are only two agencies in the USA with the resources to crash test vehicles. The IIHS,
www.iihs.org, and the NHTSA,
www.safercar.gov . They produce two sets of complimentary crash test information.
As you've discovered, many vehicles are not tested. While most mainstream models do often get a full set of testing completed within a year or so of being on the market, many full-size SUVs and high end luxury models are never tested at all. This would be the case of the model you linked above as well.
You can try contacting these agencies. If it is on their list for the next model year of testing, they will usually tell you. Otherwise, my experience is that they do not comment on what they may test in future years.
Unfortunately, that means we just don't know how well many vehicles will perform in a crash. While most new vehicles do reasonably well in crash testing, there are still exceptions in every size category. While I wouldn't want my family in an untested sub-compact or mini car, I would have no issue with them periodically riding in an untested large vehicle.
In the past, I've purchased vehicles before they had a full set of crash test results. Sometimes even safety advocates have other criteria for vehicle selection, too;-)