rememberPullRefreshState

@Composable
@ExperimentalMaterialApi
fun rememberPullRefreshState(
    refreshing: Boolean,
    onRefresh: () -> Unit,
    refreshThreshold: Dp = PullRefreshDefaults.RefreshThreshold,
    refreshingOffset: Dp = PullRefreshDefaults.RefreshingOffset
): PullRefreshState

import androidx.compose.foundation.layout.Box
import androidx.compose.foundation.layout.fillMaxSize
import androidx.compose.foundation.lazy.LazyColumn
import androidx.compose.material.ListItem
import androidx.compose.material.Text
import androidx.compose.material.pullrefresh.PullRefreshIndicator
import androidx.compose.material.pullrefresh.pullRefresh
import androidx.compose.material.pullrefresh.rememberPullRefreshState
import androidx.compose.runtime.mutableStateOf
import androidx.compose.runtime.remember
import androidx.compose.runtime.rememberCoroutineScope
import androidx.compose.ui.Alignment
import androidx.compose.ui.Modifier

val refreshScope = rememberCoroutineScope()
var refreshing by remember { mutableStateOf(false) }
var itemCount by remember { mutableStateOf(15) }

fun refresh() =
    refreshScope.launch {
        refreshing = true
        delay(1500)
        itemCount += 5
        refreshing = false
    }

val state = rememberPullRefreshState(refreshing, ::refresh)

Box(Modifier.pullRefresh(state)) {
    LazyColumn(Modifier.fillMaxSize()) {
        if (!refreshing) {
            items(itemCount) { ListItem { Text(text = "Item ${itemCount - it}") } }
        }
    }

    PullRefreshIndicator(refreshing, state, Modifier.align(Alignment.TopCenter))
}