He hasn't, due to being terribly fixated on the task at hand, but he'll come to notice it in due time.

"I like it! Very traditional. Love this kinda stuff, ya know? Seein' what the world looks like through the eyes of others. That's one of the reasons why I travel so much!"

Another giggle. The other reasons are self-evident and don't need to be mentioned right now.

"Anywhoo..." Junkrat reaches into his bag and pulls out that black metal sphere. "I made somethin' for ya!"

He places it on the floor and gives it a little push so that it rolls across the floor in her direction, making a heavy echo like a bowling ball in an alley. "Give 'er a twist," he instructs, holding one hand over the other to demonstrate.

The real question is, does Fareeha trust Junkrat enough to open up something he's given her that looks very much like it could explode?