Setting Fallback Fonts in FontFamily Styling is Not Supported

Description

There is an issue already for this bug #25798, but for some reason it has been closed even though it's not fixed yet. This issue should not be closed even if there is inactivity. It is a bug obviously.

This is a critical bug especially if there are multi-languages in the app, let's say an app with both Hebrew and Latin texts. For the Hebrew text you use "HebrewFont" and for Latin text you use "LatinFont", so you should be able to set the fontFamily to "HebrewFont, LatinFont"

Steps to reproduce

This line of code works fine:
<Text style={{ fontFamily: "sans-serif" }}>Hello</Text>
This line of code works fine too:
<Text style={{ fontFamily: "Roboto" }}>Hello</Text>
But this doesn't work:
<Text style={{ fontFamily: "Roboto, sans-serif" }}>Hello</Text>

React Native Version

0.76.2

Affected Platforms

Runtime - Android, Runtime - iOS

Output of npx react-native info

Any React Native Project!

Stacktrace or Logs

There are no logs related to this issue

Reproducer

Any React Native Project!

Issue にある最小限の React Native 再現コードから始め、Android と iOS で、単一フォントを使用する既存のケースと fontFamily: "Roboto, sans-serif" を比較します。両方の対象プラットフォームで、多言語テキストに対してカンマ区切りのフォールバックフォントが機能し、報告された動作をカバーするテストがあることが完了の条件です。