Why my bottomSheet comes from the top of screen in the jetpack compose

Question

I have a bottomSheet but it comes from the top of the screen to the bottom when the screen is showing. How can I fix it?

This is my bottomSheet codes:

@ExperimentalMaterialApi
@Composable
fun BottomSheet(
    modifier: Modifier = Modifier,
    buttonText: String,
    composable: @Composable () -> Unit,
    scope: CoroutineScope
) {
    val bottomSheetScaffoldState = rememberBottomSheetScaffoldState(
        bottomSheetState = BottomSheetState(BottomSheetValue.Expanded)
    )
    BottomSheetScaffold(
        scaffoldState = bottomSheetScaffoldState,
        sheetContent = {
            Column(
                Modifier
                    .fillMaxWidth()
                    .height(200.dp)
                    .padding(8.dp),
                verticalArrangement = Arrangement.Center,
                horizontalAlignment = Alignment.CenterHorizontally
            ) {
              
                Button(colors = ButtonDefaults.buttonColors(
                    backgroundColor = AppColor.brandColor.BLUE_DE_FRANCE,
                    contentColor = AppColor.neutralColor.DOCTOR
                ),
                    shape = RoundedCornerShape(
                        small
                    ),
                    onClick = {
                        scope.launch {
                            bottomSheetScaffoldState.bottomSheetState.collapse()
                        }
                    }) {
                }
            }
        },
        sheetPeekHeight = 0.dp,
        sheetShape = RoundedCornerShape(topEnd = medium, topStart = medium)
    ) {
        composable()
    }

}

the composable function is a google map screen