For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/openSUSE_Tumbleweed/devel:libraries:libyui.repo
zypper refresh
zypper install yast2-ycp-ui-bindings
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/openSUSE_Factory/devel:libraries:libyui.repo
zypper refresh
zypper install yast2-ycp-ui-bindings
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/devel:libraries:libyui/15.4/devel:libraries:libyui.repo
zypper refresh
zypper install yast2-ycp-ui-bindings