SectionList shows inconsistent SeparatorComponent behaviour when using inverted

Description

I found that when SectionList is used inverted on mobile, the SectionSeparatorComponent is not rendered correctly. It renders in between items of the same section - while it shouldn't - and it renders double sometimes there as well.

I found that this happens on both Android and iOS with the latest SDKs and frameworks.
On web it appears not to be an issue.

Steps to reproduce

Here is an expo snack that shows the behavior;
https://snack.expo.dev/@natuurhuisje-dev/sectionlist-inverted-separatorcomponent-inconsistency

React Native Version

tested with issue on both 0.79.5 and 0.81

Affected Platforms

Runtime - iOS, Runtime - Android

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

I've got an Expo snack, hope this is sufficient.

Stacktrace or Logs

I've got an Expo snack, hope this is sufficient.

MANDATORY Reproducer

https://snack.expo.dev/@natuurhuisje-dev/sectionlist-inverted-separatorcomponent-inconsistency

Screenshots and Videos

No response

运行链接的 Expo Snack，并比较 inverted SectionList 在 Android 和 iOS 上的行为，重点关注 SectionSeparatorComponent 的位置以及重复渲染问题。阅读链接的 pull request #53799，了解当前的工作。完成标准是：分隔符不会渲染在同一 section 的项目之间，也不会重复渲染。