documentCoordinator

The DocumentCoordinator managing the documents shown by this state's com.pspdfkit.jetpack.compose.views.DocumentView: add documents to it to open them in the same view, and bind a com.pspdfkit.compose.tabs.composables.NutrientTabBar to it to show a tab per document. It is null until the document UI has been initialized, so collect it and render the tab bar only once it is non-null:

val coordinator by documentState.documentCoordinator.collectAsState()
coordinator?.let { NutrientTabBar(documentCoordinator = it) }