You would notice this trend from a lot of celebrities like Ycee, Olamide and the jacket/shirt shrug Wizkid.
It’s a form of styling and layering, so you look like the cool kid on the block. The trick is to wear the jacket, whichever kind it is, halfway to your shoulders so your look like you’re about to take it off or just about to put it on. Hence, the jacket shrug.
Remember this type of styling is more suitable for casual wear.