Low performance with a SpatialNavigationVirtualisedList and lots of data

**Describe the bug**
A clear and concise description of what the bug is.

**To Reproduce**
```tsx

```

**Expected behavior**
The list is lazy loading and maintains high performance correctly.

**Actually behavior**
The list is loaded all at once without any lazy loading logic being applied

**Version and OS**
- Library version: 3.6.1
- React Native version: 0.72.0

**Additional context**
Use a data set of at least 40 elements, as render items we need to use other SpatialNavigationVirtualisedLists, so we have a SpatialNavigationVirtualisedList that renders other SpatialNavigationVirtualisedLists
All render item have differnt height size

Start with the SpatialNavigationVirtualizedList implementation and reproduce the issue using at least 40 elements, nested SpatialNavigationVirtualizedLists, and render items with different heights. Verify that numberOfRenderedItems and numberOfItemsVisibleOnScreen limit work as expected, and that the list is lazy-loaded rather than rendering all items at once.

Written by the indexing model from the issue text.