BoxWithConstrain {
   val maxHeight = maxHeight
   Box(
     Modifier.heightIn(min = 0.dp, max = maxHeight * .8f)
   )
}

Box(
    modifier = Modifier.layout { measurable, constraints ->
        val placeable = measurable.measure(
            constraints.copy(maxHeight = (constraints.maxHeight * 0.8f).roundToInt())
        )
        layout(placeable.width, placeable.height) {
            placeable.place(0, 0)
        }
    }
)