I've created subdirs project. In it:
- Created an empty QtQuick application.
- Created shared library project.
- Added the use of a class from shared library in the main application.
- Tried to build & run on arm7 phone. Result: app crashes. Reason: shared library is absent in APK. Worked fine in previous versions of Qt Creator.
Tested with Qt 5.12.11 and Qt 6.2.1.