Uno.Extensions MVUX PaginatedAsync (BindableListFeed) does not trigger incremental loading

[luckypong]

Description

TableView currently supports incremental loading through ISupportIncrementalLoading.

Internally, CollectionView forwards incremental loading requests as follows:

public IAsyncOperation<LoadMoreItemsResult>? LoadMoreItemsAsync(uint count)
{
    return (_source as ISupportIncrementalLoading)?.LoadMoreItemsAsync(count);
}

public bool HasMoreItems =>
    (_source as ISupportIncrementalLoading)?.HasMoreItems ?? false;

However, when using Uno.Extensions MVUX:

public IListFeed<MyItem> Items =>
    ListFeed.PaginatedAsync(...);

the runtime source becomes:

Uno.Extensions.Reactive.Bindings.BindableListFeed<T>

which does not implement ISupportIncrementalLoading.

As a result:

_source as ISupportIncrementalLoading

returns null and TableView never requests additional pages.

Expected behavior

TableView should support Uno.Extensions MVUX paginated feeds similarly to ListView, or provide an extensibility point for custom incremental loading providers.

Environment

• Uno Platform
• Uno.Extensions.Reactive
• WinUI.TableView

Contribution:

• I am willing to submit a PR to fix this issue