@SGaist Just tried to build the same module on the Windows machine and I would say that Qt might have a bug inside.
There is no Release configuration, I had to specify the RelWithDebInfo.
conan install .. --build=missing --profile=C:\Qt\Tools\Conan\profiles\qt-6.0.0-msvc2019_64 -s build_type=RelWithDebInfo -g cmake_paths -g=cmake -g deploy -o qtimageformats:shared=True