During Chapter 11 you will enter the cargo bay. This is a room that will have a bench on your left and a lift on your right. The marker will also be in this room. To find the Peng treasure all you need to do is head down the lift, turn left, move the box with Kinesis, and open the locker. The achievement will unlock after you pick the treasure up.
If you'd like a visual aid I've created a 50 second YouTube Short guide showing how to get the Peng treasure.
https://youtube.com/shorts/ILBwmSRZNsI?feature=share