Considering that Teslas are among the highest rated vehicles regarding the safety/crash testing, it is mindless speculation to think that the Cybertruck will get a low rating for occupant safety. You are assuming that Tesla's engineers didn't have crash worthiness as a primary prerequisite in the design from the very beginning, along with making sure that it would meed NHTSA regulations for things like ride height, headlights & tail lights and all the other minutiae that vehicles need to adhere to in order to be sold in the US.
I wouldn't bet against Tesla when it comes to these things. Especially when they started with a clean slate in the design and production methods and materials. You can be sure that plenty of crash testing has already occurred.
Now if it was a company like GM that allowed their pickup trucks with dual saddle gas tanks that could easily explode from a side impact to remain on the road for years before a recall because it was cheaper to pay off lawsuits than to recall them, I wouldn't be surprised if safety compromises were made in the design and production. That's what happens when you don't have the resources to do things right in the first place.