Hi,
No, no container here. Qt uses plugins to talk to the underlying platform. Each has it's own specificity like e.g. Objective C/C++ for iOS or Java for android. But for you basically it doesn't change anything, you write code either in C++ and/or QML (unless you need some platform specific stuff in which case you'll do write e.g. a bit of Objective C/C++ for iOS). You don't have to worry about the underlying stuff.
Hope it helps