From the original coil docs: Requests can be configured with an optional trailing lambda:

imageView.load("<https://www.example.com/image.jpg>") {
    crossfade(true)
    placeholder(R.drawable.image)
    transformations(CircleCropTransformation())
}

Anyone know how I would use coil crossfade, or does it not make sense in a compose world and I should instead use composes crossfade?

Was finally able to circle back to this. Ideas why my placeholder doesn't show?

val painter = rememberCoilPainter(request = imageUrl)

Crossfade(targetState = painter.loadState) {
    when (it) {
        ImageLoadState.Empty -> {}
        is ImageLoadState.Loading -> {
            Spacer(modifier = Modifier.matchParentSize().background(Color(0xffff0000)))
        }
        is ImageLoadState.Success -> {
            Image(
                painter = painter,
                contentDescription = null,
                contentScale = ContentScale.Crop,
                alpha = alpha)
        }
        is ImageLoadState.Error -> {}
    }
}