Qt's CMake deployment API not working

I tried to use the CMake deployment API presented here without success: https://www.qt.io/blog/cmake-deployment-api

The following code in the blog post works using regular Qt binaries but fails when using the recipe from conan center index:

qt_generate_deploy_app_script(
    TARGET MyApp
    OUTPUT_SCRIPT deploy_script
    NO_UNSUPPORTED_PLATFORM_ERROR
)
install(SCRIPT ${deploy_script}) 

Here is the output despite I use the shared version of Qt:

Support for installing runtime dependencies is not implemented for this target platform (Darwin, static Qt libs).

Looking at the code, I noticed that QT6_IS_SHARED_LIBS_BUILD is not defined.

It is defined here: /path/to/qt/lib/cmake/Qt6Core/Qt6CoreConfigExtras.cmake but apparently not handled by the conan toolchain.I tried to add it manually to the toolchain but I had other errors and prefered stop exploring that way.

I don't know how Qt is involved in conan center index but I wondered if you would have an idea to help make this API works when using conan.