As a workaround, can I suggest Gitimoji (for macOS) or other Gitmoji related tools? Of course, that wouldn't fully replace native integration of the emoji picker, but for Gitmoji use cases, it does the job quite well. For Gitimoji, you can even bind a shortcut to show the popup, so it replaces the native integration quite well. I use "Cmd + ." so I'm just one "Cmd + V" away from inserting the emoji.
As a workaround, can I suggest Gitimoji (for macOS) or other Gitmoji related tools? Of course, that wouldn't fully replace native integration of the emoji picker, but for Gitmoji use cases, it does the job quite well. For Gitimoji, you can even bind a shortcut to show the popup, so it replaces the native integration quite well. I use "Cmd + ." so I'm just one "Cmd + V" away from inserting the emoji.