Especially in Qt Quick for Android, it's possible that the Activity changes during the lifetime of the Qt part of the app. The Activity/Context is also exposed to the user via a public API, https://doc.qt.io/qt-6/qnativeinterface-qandroidapplication.html#context

So, the user could either hold a reference to that Context in their C+/Qt code, or even pass it to some Android APIs, e.g. to register BroadcastReceivers. Also, Qt Android codebase internally uses this Context a lot, also in C+. So there should be some way, in the public API, to let the user know that the Activity/Context has changed, and any references to it should be cleared etc.