For openSUSE Factory ARM run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:branches:Base:System/openSUSE_Factory_ARM/home:sbrabec:branches:Base:System.repo
zypper refresh
zypper install python3-libmount
For openSUSE Factory run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:branches:Base:System/openSUSE_Factory/home:sbrabec:branches:Base:System.repo
zypper refresh
zypper install python3-libmount
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/home:sbrabec:branches:Base:System/15.4/home:sbrabec:branches:Base:System.repo
zypper refresh
zypper install python3-libmount