build.gradle.kts

dependencies {
    implementation("androidx.emoji2:emoji2:1.2.0")

    // https://developer.android.com/jetpack/androidx/releases/emoji2#emoji2_emojipicker_version_10_2
    implementation("androidx.emoji2:emoji2-emojipicker:1.0.0-alpha01")
}

EmojiGrid.kt

@Composable
fun EmojiGrid(
    onEmojiPicked: (String) -> Unit,
    modifier: Modifier = Modifier,
) {
    val emojiPickedListener = androidx.core.util.Consumer<EmojiViewItem> {
        onEmojiPicked(it.emoji)
    }

    Box(
        modifier = modifier
            .fillMaxSize()
    ) {
        AndroidView(
            modifier = modifier
                .fillMaxSize(),
            factory = { context ->
                EmojiPickerView(context)
            },
            update = {
                it.setOnEmojiPickedListener(emojiPickedListener)
                it.emojiGridRows = 5.5f
            }
        )
    }
}