For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:nixda:devel/openSUSE_Factory/home:nixda:devel.repo
zypper refresh
zypper install libldap-2_4-2
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:nixda:devel/15.5/home:nixda:devel.repo
zypper refresh
zypper install libldap-2_4-2
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:nixda:devel/15.4/home:nixda:devel.repo
zypper refresh
zypper install libldap-2_4-2