One of the operating systems shown below is required in order to use Fujitsu Enterprise Postgres. Check and use minor version, which is certified and currently supported by Red Hat or SUSE for the target IBM z / Linux One hardware.
The sepgsql module, which is a PostgreSQL extension, can be used in RHEL8.
RHEL8.6 or later minor version
RHEL9.2 or later minor version
SLES 15 SP4 or later minor version