No, Jungkook does not have a button nose.
While there might be instances where his nose appears smaller or more pointed, potentially due to makeup techniques, the general consensus is that his nose is rounder and fuller, particularly when he is not wearing makeup. The reference indicates that his nose appears "plump" in his bare-faced appearances. A button nose is typically characterized as small, round, and slightly upturned, which doesn't accurately describe Jungkook's nose shape.
