What does 구멍 look like on Samsung?

On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.

When did Samsung add 구멍?

Samsung first drew 구멍 in Touchwiz 6.0, released 2016년 3월 7일.

Samsung Electronics has shipped 24 versions of 구멍. Each is dated, so you can see when the design changed.

Samsung One UI 2.1

This is the design Samsung introduced in One UI 2.0, shipped again unchanged. It was not redrawn for this release.

✳ marks a release that redrew this emoji. The rest re-shipped the design unchanged.

What does 구멍 look like on Samsung?: On Samsung it is the design shipped in One UI 8.5, shown above at full size. Older revisions are listed beneath it.
When did Samsung add 구멍?: Samsung first drew 구멍 in Touchwiz 6.0, released 2016년 3월 7일.
How many times has Samsung redrawn 구멍?: Samsung Electronics has shipped 24 versions of 구멍. Each is dated, so you can see when the design changed.