To be able to compile umbrello on Windows binary packages of the required KF5 libraries are required. The major challenge here is to follow the rapid development process in term of following updated versions, internal changes or added external dependencies. Also in case cross library changes need to be implemented it is required to talk to all related library maintainers, which may be blocked by different maintainers perspectives.
packages for version 5.41 are located at https://build.opensuse.org/project/show/home:rhabacker:branches:windows:mingw:win32:KF541
packages has been updated to 5.47 at https://build.opensuse.org/project/show/home:rhabacker:branches:windows:mingw:win32:KF547 and https://build.opensuse.org/project/show/home:rhabacker:branches:windows:mingw:win64:KF547
Packages for Release 5.65 are in preparation for releasing, see https://build.opensuse.org/project/show/home:rhabacker:branches:windows:mingw:win32:KF565
To reduce the required effort not every KDE framework version will be released.