Conan boost dlls not installed on Windows -> runtime exception - boost

Question

I have a conan recipe of a package, named Package, that requires boost as a shared library:
def requirements(self):
self.requires("boost/1.79.0#")
self.options["boost"].shared = True
self.options["boost"].bzip2 = False
self.options["boost"].without_stacktrace = True
The used generators are CMakeDeps and CMakeToolchain.
def generate(self):
tc = CMakeToolchain(self)
tc.variables['BUILD_SHARED_LIBS'] = "ON" if self.options.shared == True else "OFF"
tc.variables['CMAKE_FIND_ROOT_PATH_MODE_PACKAGE'] = 'NEVER'
tc.variables['CMAKE_POSITION_INDEPENDENT_CODE'] = 'ON'
tc.generate()
The unit tests of this conan package use a CMakeLists.txt which defines a PackageTests target that links against Package and boost::boost.
Building the Package and PackageTests works fine for both Ubuntu and Windows but only on Ubuntu the tests run without issues. On Windows I get exceptions for all the tests because the boost dlls are not found. Using ldd PackageTests and readelf -d PackageTests on Ubuntu shows that boost so files are used from the conan cache.
Using conans VirtualRunEnv generator and then activating the generated environement helps to also run the PackageTests.exe on Windows but I would like to know if there is another way using for example pure CMake to install/copy the required boost dlls to the bin/PackageTests.exe folder? Or is there a way to extend the conan recipe to install the dlls on Windows?
Why are boost shared libraries found correctly in the conan cache but not on Windows? Is there some extra manual work needed or shouldn't this be handeled by conan as well?
Edit:
Trying to use the following to copy the dlls results in a cmake command usage error because the TARGET_RUNTIME_DLLS generator expression is empty.
add_custom_command(TARGET PackageTest POST_BUILD
COMMAND ${CMAKE_COMMAND} -E copy_if_different $<TARGET_RUNTIME_DLLS:PackageTest > $<TARGET_FILE_DIR:PackageTest>
COMMAND_EXPAND_LISTS
)
Also IMPORTED_LOCATION property for the following targets are *-NOTFOUND:
get_target_property(VAR-boost boost::boost IMPORTED_LOCATION)
message(${VAR-boost})
> VAR-boost-NOTFOUND
get_target_property(VAR-Package Package IMPORTED_LOCATION)
message(${VAR-Package})
> VAR-Package-NOTFOUND
get_target_property(VAR-Package PackageTest IMPORTED_LOCATION)
message(${VAR-Package})
> VAR-PackageTest-NOTFOUND
From the boost conan recipe package_info() I can see that the CMakeDeps generator will only create the BoostConfig.cmake and BoostTargets.cmake scripts, which is also the case for Package. There is no FindBoost.cmake generated. By default CMakeDeps only creates config scripts, except the recipes define cmake_find_mode to be both. Not sure though if adding both to the recipe could help. Even if it would help, this is no immediate solution as this is not directly in my control (hosted on conan-center-index repo). I am still not able to see the reason why everything works fine on Ubuntu but on Windows the dlls are not found/copied at all by conan.