For openSUSE Tumbleweed run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:database:percona/openSUSE_Tumbleweed/server:database:percona.repo
zypper refresh
zypper install percona-toolkit
For 15.5 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:database:percona/15.5/server:database:percona.repo
zypper refresh
zypper install percona-toolkit
For 15.4 run the following as root:
zypper addrepo https://download.opensuse.org/repositories/server:database:percona/15.4/server:database:percona.repo
zypper refresh
zypper install percona-toolkit