Qt has data grids built in, but QAbstractItemModel is a nightmare to implement and interface with (https://www.reddit.com/r/QtFramework/comments/rx0c8e//hrfvyz..., https://docs.google.com/document/d/1__bldg9SwENN2d6LyiX0wwX5...). I think some of the incidental complexity could be fixed, and the implementation could definitely be simplified by removing dragging between widgets (which requires the model's backing data store be built around adding and removing items, rather than merely reordering them), but I feel it's inherently difficult to communicate changes to data to the QAbstractItemView in the form of individual insert/delete/move operations. I haven't explored the JS world's approaches to UI diffing or lazy-loaded data grids though.

I have no idea why browsers maker don't look at what Desktop and Mobile GUI frameworks provide and implement same functionality, like give us a ListView or GridView that is implemented to be efficient and you don't have to use pagination as a workaround.