Hmm ... It's impossible ;-) This RPM doesn't exist on any FTP server

Provides :
application()
application(qt6-designer.desktop)
mimehandler(application/x-designer)
qt6-designer
qt6-designer(x86-64)

Requires :

libQt6Core.so.6()(64bit)
libQt6Core.so.6(Qt_6)(64bit)
libQt6Core.so.6(Qt_6.6)(64bit)
libQt6Designer.so.6()(64bit)
libQt6Designer.so.6(Qt_6)(64bit)
libQt6DesignerComponents.so.6()(64bit)
libQt6DesignerComponents.so.6(Qt_6)(64bit)
libQt6Gui.so.6()(64bit)
libQt6Gui.so.6(Qt_6)(64bit)
libQt6Network.so.6()(64bit)
libQt6Network.so.6(Qt_6)(64bit)
libQt6PrintSupport.so.6()(64bit)
libQt6PrintSupport.so.6(Qt_6)(64bit)
libQt6Widgets.so.6()(64bit)
libQt6Widgets.so.6(Qt_6)(64bit)
libQt6Xml.so.6()(64bit)
libQt6Xml.so.6(Qt_6)(64bit)
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.3.4)(64bit)
libc.so.6(GLIBC_2.34)(64bit)
libc.so.6(GLIBC_2.4)(64bit)
libstdc++.so.6()(64bit)
libstdc++.so.6(CXXABI_1.3)(64bit)
libstdc++.so.6(CXXABI_1.3.9)(64bit)
libstdc++.so.6(GLIBCXX_3.4)(64bit)
qt6-qttools-libs-designer(x86-64) = 6.6.2-2.el9
qt6-qttools-libs-designercomponents(x86-64) = 6.6.2-2.el9
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PartialHardlinkSets) <= 4.0.4-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1
rtld(GNU_HASH)

Content of RPM :
/usr/bin/designer-qt6
/usr/lib/.build-id
/usr/lib/.build-id/5b
/usr/lib/.build-id/5b/8e0861ed4e94f272d46345c7febf6912bd4f46
/usr/lib/.build-id/5b/8e0861ed4e94f272d46345c7febf6912bd4f46.1
/usr/lib64/qt6/bin/designer
/usr/lib64/qt6/bin/designer-qt6
/usr/share/applications/qt6-designer.desktop
/usr/share/icons/hicolor/128x128/apps/designer-qt6.png