Play Asset Delivery は、Android App Bundle (AAB) のためのアセット分割ソリューションです。Play Asset Delivery を使用するには、プロジェクトを次のように設定してください。
When you build your application, Unity creates an AAB that includes your application split into a base module and asset packs. For more information, refer to Asset packs in Unity.
Important: Unity uses the PLAY_ASSET_PACKS
Gradle template variable to specify which asset packs to include in the Android App Bundle. If you use a custom Gradle template that was created before Unity supported Play Asset Delivery, your template won’t contain this variable. Because Unity automatically generates the values for this variable, it’s best practice to recreate your Gradle template file from the current Unity version and reapply your modifications on top.