Hi Brian,
This item is currently not included in our short-term planning. We are constantly monitoring the community interest and demand when evaluating and prioritizing the feature requests. There are a lot of functionalities that are available in some of our mature products but still on the go in UI for Blazor. We are constantly working on enhancing the product but there is also the capacity factor that we should consider along with the demand when finalizing our roadmap. The easiest way to keep in track with the progress of the feature is to follow the post - once we know which release will include this enhancement, we will update its status and you will be notified via email accordingly.
Regards,
Nadezhda Tacheva
Progress Telerik
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Would Virtual Scrolling work for what you're trying to do? Here's a link to the demo page: