The trap bar is a fantastic tool to build strength for almost anyone. Team sport athletes and general fitness enthusiasts especially can use it as their go-to strength builder.
Unfortunately, the trap bar has limited carryover to powerlifting. It’s too far removed from a conventional or sumo deadlift to have a big impact, so I don’t recommend it for powerlifters. However, the trap bar is pretty darn useful for a few accessory exercises, most of which AREN’T deadlifts. Check out these two exercises that build tremendous upper back and core strength: