Hi Ricardo,
Greetings from Syncfusion support.
Currently, we have not provided support for load on demand in ListView component. We have consider this as a feature improvement task in ListView component. This feature will be in any one of our upcoming release. Generally, we will plan the feature implementation based on feature rank, Wishlist plan and customer request count for some feature.
You can track the feature status through the below portal link.
We appreciate your patience.
Regards,
Sowmiya.P