What does 钥匙 look like on Apple?

On Apple it is the design shipped in iOS 26.4, shown above at full size. Older revisions are listed beneath it.

When did Apple add 钥匙?

Apple first drew 钥匙 in iPhone OS 2.2, released 2008年11月20日.

Apple Inc. has shipped 28 versions of 钥匙. Each is dated, so you can see when the design changed.

Apple iOS 14.5

This is the design Apple introduced in iOS 12.1, 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 钥匙 look like on Apple?: On Apple it is the design shipped in iOS 26.4, shown above at full size. Older revisions are listed beneath it.
When did Apple add 钥匙?: Apple first drew 钥匙 in iPhone OS 2.2, released 2008年11月20日.
How many times has Apple redrawn 钥匙?: Apple Inc. has shipped 28 versions of 钥匙. Each is dated, so you can see when the design changed.