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

Provides :
libplanui.so.18
libplanui18
libplanui18(x86-32)

Requires :

libKChart.so.2
libKF5Completion.so.5
libKF5ConfigWidgets.so.5
libKF5CoreAddons.so.5
libKF5I18n.so.5
libKF5KIOCore.so.5
libKF5KIOWidgets.so.5
libKF5TextWidgets.so.5
libKF5WidgetsAddons.so.5
libKF5XmlGui.so.5
libKGantt.so.2
libQt5Core.so.5
libQt5Core.so.5(Qt_5)
libQt5Core.so.5(Qt_5.15)
libQt5Gui.so.5
libQt5Gui.so.5(Qt_5)
libQt5PrintSupport.so.5
libQt5PrintSupport.so.5(Qt_5)
libQt5Widgets.so.5
libQt5Widgets.so.5(Qt_5)
libQt5Xml.so.5
libQt5Xml.so.5(Qt_5)
libc.so.6
libc.so.6(GLIBC_2.0)
libc.so.6(GLIBC_2.1.3)
libm.so.6
libm.so.6(GLIBC_2.0)
libplankernel.so.18
libplankundo2.so.18
libplanmain.so.18
libplanmodels.so.18
libplanodf.so.18
libplanstore.so.18
libplanwidgets.so.18
libplanwidgetutils.so.18
libstdc++.so.6
libstdc++.so.6(CXXABI_1.3)
libstdc++.so.6(GLIBCXX_3.4)
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/lib/.build-id
/usr/lib/.build-id/0d
/usr/lib/.build-id/0d/70666ea48a97b688444ce595b3c6c8696f0699
/usr/lib/libplanui.so.18
/usr/lib/libplanui.so.18.0.0