Our Qt6Config.cmake file limits on purpose the component search to the current Qt6/.. dir location using the NO_DEFAULT_PATH.

This means that even if CMAKE_PREFIX_PATH is set to point to wherever Conan installed NetworkAuth, find_package(Qt6 COMPONENTS NetworkAuth) will report NetworkAuth is not found.

A workaround is to call find_package(Qt6NetworkAuth) directly which would pick it up from CMAKE_PREFIX_PATH, bypassing the Qt6Config file.
In such a case the dependencies need to be explicitly specified as well, which means that the working workaround code would be

 find_package(Qt6 COMPONENTS Network)
 find_package(Qt6NetworkAuth)

Figure out why we limit the dir path and we if can disable it, or augment it with some additional variable where to look for packages.
I suspect we limit it to, to ensure we don't pick up distro system CMake packages.