Same issue here. Game crashes on startup, with error in the Google Play Store debug logs:
Exception java.lang.RuntimeException: Unable to start activity ComponentInfo{com.my.APP/com.my.APP.DownloaderActivity}: java.lang.IllegalArgumentException: com.my.APP: Targeting S+ (version 31 and above) requires that one of FLAG_IMMUTABLE or FLAG_MUTABLE be specified when creating a PendingIntent.
How can I make the Unreal Engine 5 rendering process to set the FLAG_MUTABLE correctly so it won’t crash on startup when opening it on a real mobile device?