The update is focused on the Android APK version of the mod. While specific patch notes for every version are rarely centralized due to the mod's fan-made nature, recent versions like 1.28.1 are known for:
Brutal Mode EX is a high-difficulty Chinese modification that significantly alters plant and zombie mechanics. pvz brutal mode ex update 1281 siku link
Finding a reliable "Siku link" often refers to community-shared mirrors. Because these are private or fan-managed mods, official app stores do not host them. The update is focused on the Android APK version of the mod