You say "component." Does that mean it looks like it can be removed?
On the top, it appears to be completely surrounded by solder mask. What does the bottom show? Could it be a Test Point that is connected by an untented via to whatever is on the bottom?
The absence of any silkscreen might weigh against it being that.
I couldn't detect any traces around the top. Considering how small things are getting, it could be a gas sensor (the hole) in a BGA package. But there would have to be at least 2 and probably 3 connections on the bottom. Does that hole goes clear through the board? (I can't tell from that picture.)