Finding individual modules fails

Finding the qtbase modules fails when not using find_package(Qt6 ...)

Minimal test case:

cmake_minimum_required(VERSION 3.16)
project(test)
find_package(Qt6Core)

complains because /QtFeature.cmake cannot be found.

The generated Qt6CoreConfig.cmake contains: include(${_qt_6_config_cmake_dir}/QtFeature.cmake)

and _qt_6_config_cmake_dir is defined in Qt6Config.cmake which is not searched in this case.