Does CollectionView support infinite scrolling, load on demand, and virtualization for large datasets?

Yes. CollectionView provides RemainingItemsThreshold/RemainingItemsThresholdReached for incremental loading and includes recycling strategies that allow it to handle large datasets when properly tuned.

<CollectionView ItemsSource="{Binding Items}" RemainingItemsThreshold="5" RemainingItemsThresholdReachedCommand="{Binding LoadMoreCommand}" />