I have to imagine the terrain management system will modulate the brakes to stop wheel spin for whatever mode you choose (ie. Mud, sand, etc.) Of course, there are also optional electronic locking front and rear diffs that you can manually engage, if equipped.
In my experience, it is best to shut all the "nannies" off on my 2015 F-150 when traversing sand/beach. The locking rear differential is what helps you when you get into the really soft stuff.
This was a really interesting video in that the gladiator with locking diffs had the hardest time, mostly due to length and ground clearance. (???) The new defender they brought did not have locking diffs, but was shorter and did it much easier. I guess they brake the wheels and that forces them all to spin??? The old defender with a manual stalled, and then climbed right over. Short and tall of course. The guy with a 4 runner said nope.
Even if you think you aren't in to rock crawling, often there is one spot on the trail that will require it.