RocketsListContent.kt

const val ROCKET_DIVIDER_TEST_TAG = "rocketDividerTestTag"

@Composable
fun RocketsListContent(
    rocketList: List<RocketDisplayable>,
    (...)
) {
    LazyColumn(...) {
        itemsIndexed(
            items = rocketList,
            key = { _, rocket -> rocket.id }
        ) { index, item ->
            RocketItem(
                rocket = item,
                (...)
            )

            if (index < rocketList.lastIndex) {
                HorizontalDivider(
                    modifier = Modifier.testTag(ROCKET_DIVIDER_TEST_TAG)
                )
            }
        }
    }
}