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

Provides :
cmake(Qt5Designer)
cmake(Qt5DesignerComponents)
cmake(Qt5UiPlugin)
cmake(Qt5UiTools)
cmake(qt5designer)
cmake(qt5designercomponents)
cmake(qt5uiplugin)
cmake(qt5uitools)
devel(libQt5Designer(64bit))
devel(libQt5DesignerComponents(64bit))
lib64qt5designer-devel
lib64qt5designer-devel(x86-64)
libqt5designer-devel
libqt5designer-private-devel
libqtdesigner5-devel
libqtdesigner5-private-devel
pkgconfig(Qt5Designer)
pkgconfig(Qt5UiPlugin)
pkgconfig(Qt5UiTools)
qt5designer-devel
qt5designer-private-devel
qtdesigner5-devel
qtdesigner5-private-devel

Requires :

devel(libQt5Core(64bit))
devel(libQt5Designer(64bit))
devel(libQt5Gui(64bit))
devel(libQt5Widgets(64bit))
devel(libQt5Xml(64bit))
devel(libm(64bit))
devel(libstdc++(64bit))
lib64qt5designer5 = 5.15.12
libQt5Core.so.5()(64bit)
libQt5Core.so.5(Qt_5)(64bit)
libQt5Core.so.5(Qt_5.15)(64bit)
libQt5Gui.so.5()(64bit)
libQt5Gui.so.5(Qt_5)(64bit)
libQt5Widgets.so.5()(64bit)
libQt5Widgets.so.5(Qt_5)(64bit)
libc.so.6()(64bit)
libc.so.6(GLIBC_2.14)(64bit)
libc.so.6(GLIBC_2.2.5)(64bit)
libc.so.6(GLIBC_2.34)(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)
pkgconfig
pkgconfig(Qt5Core)
pkgconfig(Qt5Gui)
pkgconfig(Qt5UiPlugin)
pkgconfig(Qt5Widgets)
pkgconfig(Qt5Xml)
qttools5-designer = 5.15.12
rpmlib(CompressedFileNames) <= 3.0.4-1
rpmlib(FileDigests) <= 4.6.0-1
rpmlib(PayloadFilesHavePrefix) <= 4.0-1
rpmlib(PayloadIsZstd) <= 5.4.18-1

Content of RPM :
/usr/include/qt5/QtDesigner
/usr/include/qt5/QtDesigner/5.15.12
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/abstractdialoggui_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/abstractintrospection_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/actioneditor_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/actionprovider_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/actionrepository_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/codedialog_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/connectionedit_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/csshighlighter_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/deviceprofile_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/dialoggui_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/extensionfactory_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/formbuilderextra_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/formlayoutmenu_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/formwindowbase_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/grid_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/gridpanel_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/htmlhighlighter_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/iconloader_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/iconselector_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/invisible_widget_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/layout_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/layoutinfo_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/lib_pch.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/metadatabase_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/morphmenu_p.h
/usr/include/qt5/QtDesigner/5.15.12/QtDesigner/private/newactiondialog_p.h
There is 293 files more in these RPM.