NativeFlatSponsoredStoryCompose
fun NativeFlatSponsoredStoryCompose(adUnitId: String, modifier: Modifier = Modifier, loadingStrategy: AdLoadingStrategy? = null, onAdLoaded: () -> Unit? = null, onAdFailedToLoad: (AdError?) -> Unit? = null, onAdClicked: () -> Unit? = null, onAdImpression: () -> Unit? = null)
Flat editorial-style sponsored story (large headline + body + outline CTA).