rememberExpandableState

@Composable
fun rememberExpandableState(
    initiallyExpanded: Boolean = false,
    expandAnimationSpec: AnimationSpec<Float> = ExpandableItemsDefaults.expandAnimationSpec,
    collapseAnimationSpec: AnimationSpec<Float> = ExpandableItemsDefaults.collapseAnimationSpec
): ExpandableState

import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.size
import androidx.compose.runtime.Composable
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.unit.dp
import androidx.wear.compose.foundation.expandableButton
import androidx.wear.compose.foundation.expandableItem
import androidx.wear.compose.foundation.expandableItems
import androidx.wear.compose.foundation.lazy.ScalingLazyColumn
import androidx.wear.compose.foundation.rememberExpandableState
import androidx.wear.compose.material.Chip
import androidx.wear.compose.material.Icon
import androidx.wear.compose.material.OutlinedCompactChip
import androidx.wear.compose.material.Text

val expandableState = rememberExpandableState()

val sampleItem: @Composable (String) -> Unit = { label ->
    Chip(label = { Text(label) }, onClick = {}, secondaryLabel = { Text("line 2 - Secondary") })
}

val items = List(10) { "Item $it" }
val top = items.take(3)
val rest = items.drop(3)

ScalingLazyColumn(modifier = Modifier.fillMaxSize()) {
    items(top.size) { sampleItem(top[it]) }
    expandableItems(expandableState, rest.size) { sampleItem(rest[it]) }
    expandableButton(expandableState) {
        OutlinedCompactChip(
            label = {
                Text("Show More")
                Spacer(Modifier.size(6.dp))
                Icon(painterResource(R.drawable.ic_expand_more_24), "Expand")
            },
            onClick = { expandableState.expanded = true },
        )
    }
}

import androidx.compose.foundation.layout.Spacer
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.layout.padding
import androidx.compose.foundation.layout.size
import androidx.compose.ui.Modifier
import androidx.compose.ui.res.painterResource
import androidx.compose.ui.unit.dp
import androidx.wear.compose.foundation.expandableButton
import androidx.wear.compose.foundation.expandableItem
import androidx.wear.compose.foundation.lazy.ScalingLazyColumn
import androidx.wear.compose.foundation.rememberExpandableState
import androidx.wear.compose.material.Chip
import androidx.wear.compose.material.Icon
import androidx.wear.compose.material.OutlinedCompactChip
import androidx.wear.compose.material.Text

val expandableState = rememberExpandableState()

ScalingLazyColumn(modifier = Modifier.fillMaxSize()) {
    expandableItem(expandableState) { expanded ->
        Text(
            "Account Alert: you have made a large purchase.\n" +
                "We have noticed that a large purchase was charged to " +
                "your credit card account. " +
                "Please contact us if you did not perform this purchase. " +
                "Our Customer Service team is available 24 hours a day, " +
                "7 days a week to answer your account or product support question.",
            maxLines = if (expanded) 20 else 3,
            modifier = Modifier.padding(horizontal = 10.dp),
        )
    }

    expandableButton(expandableState) {
        OutlinedCompactChip(
            label = {
                Text("Show More")
                Spacer(Modifier.size(6.dp))
                Icon(painterResource(R.drawable.ic_expand_more_24), "Expand")
            },
            onClick = { expandableState.expanded = true },
        )
    }
}