Flatlist with initialScrollIndex will cause missing items

Description

If i have the initialScrollIndex set and the list is not bigger than the view (they all fit) then the items before initialScrollIndex will not render , it only works if i set disableVirtualization={true} but the order on how they are rendered doesnt seem right , for example if i have 8 items (and they all fit in the view) and i have set initialScrollIndex to 6th item with disableVirtualization={true} it will render 6 - 7 item first then the 0 to 5, if i dont disable it then it will only render item 6 and 7, if i have more items than they can fit in the view then it seems to work as expected.

Steps to reproduce

Set initialScrollIndex to any item excluding first one on a list that fits to the view.

React Native Version

0.81.5

Affected Platforms

Runtime - Android

Output of npx @react-native-community/cli info

expo  54.0.22

Stacktrace or Logs

nothing to show

MANDATORY Reproducer

/

Screenshots and Videos

No response

首先复现所描述的 Android 案例：一个项目能够容纳在视图中的 React Native FlatList，且其 initialScrollIndex 不为零。比较启用和不启用 disableVirtualization 时的渲染结果；当初始索引之前的项目无需禁用虚拟化即可按正确顺序渲染时，即表示完成。