What does リピートボタン look like on Facebook?

On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.

When did Facebook add リピートボタン?

Facebook first drew リピートボタン in 2.0, released 2017年2月20日.

Meta Platforms, Inc. has shipped 12 versions of リピートボタン. Each is dated, so you can see when the design changed.

Facebook 4.0

Facebook shipped a new design for リピートボタン in 4.0, released 2019年4月1日. The previous design is shown beside it.

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

What does リピートボタン look like on Facebook?: On Facebook it is the design shipped in 16.0, shown above at full size. Older revisions are listed beneath it.
When did Facebook add リピートボタン?: Facebook first drew リピートボタン in 2.0, released 2017年2月20日.
How many times has Facebook redrawn リピートボタン?: Meta Platforms, Inc. has shipped 12 versions of リピートボタン. Each is dated, so you can see when the design changed.