We’ve found the issue:
in the last default demo configuration in main.cpp, the demo is started not from the qrc file but from DEPLOYMENTFOLDERS.
On Android, this leads to the Qt File Selectors not working, which is the reason why we recommend loading your qml files & assets from qrc.
So by uncommenting this line in main.cpp:
using the MultiResolutionImage works. Also see the comments in main.cpp and the .pro file regarding this topic.