CurvedScroll-snap.kt

// ... other remembered values
// Required to call animateScrollTo
val scope = rememberCoroutineScope()
// A place to store item positions
val indices = remember { IntArray(itemCount) { 0 } }

val flingBehavior = object : FlingBehavior {
    override suspend fun ScrollScope.performFling(initialVelocity: Float): Float {
        // Get the current scroll position
        val value = scrollState.value
        // Find the closest item based on position
        indices.minByOrNull { abs(it - value) }?.let {
            scope.launch {
                scrollState.animateScrollTo(it)
            }
        }
        return initialVelocity
    }
}

Box(modifier = Modifier.onSizeChanged { size = it }) {
    Layout(
        // We use our flingBehavior here
        modifier = Modifier.verticalScroll(scrollState, flingBehavior = flingBehavior),
        content = { repeat(itemCount) { item(it) } }
    ) { measurables, constraints ->
        // Creating the placeables ...

        layout(constraints.maxWidth, size.height + contentHeight) {
            // ...

            placeables.forEachIndexed { index, placeable ->
                // Placing the item ...

                // Store the vertical center of the item, yPosition holds the position including the top margin
                indices[index] = yPosition - startOffset
                yPosition += placeable.height + itemSpacing
            }
        }
    }
}