MyExpandedList.kt

@ExperimentalAnimationApi
@ExperimentalMaterialApi
@Composable
fun MyExpandedList() {
    var expanded by remember { mutableStateOf(false) }

    val rotateState = animateFloatAsState(
        targetValue = if (expanded) 180F else 0F,
    )

    Column(
        modifier = Modifier
            .fillMaxWidth()
    ) {

        Card(onClick = { expanded = !expanded }) {
            Row(
                modifier = Modifier
                    .fillMaxWidth()
                    .padding(16.dp),
                horizontalArrangement = Arrangement.SpaceBetween,
                verticalAlignment = Alignment.CenterVertically
            ) {
                Text(
                    text = "This is header",
                    modifier = Modifier.fillMaxWidth(0.92F),
                    style = MaterialTheme.typography.subtitle1
                )
                Icon(
                    Icons.Default.ArrowDropDown, "",
                    modifier = Modifier.rotate(rotateState.value)
                )
            }
        }
        Divider()
        AnimatedVisibility(
            visible = expanded,
        ) {
            Column(
                modifier = Modifier
                    .fillMaxWidth()
                    .background(Color.LightGray)
                    .padding(16.dp)
            ) {
                Text(text = "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.")
            }
        }
    }
}