I was not able to reproduce your issue
[root@0bbca0f77bff /]# percona-release setup ppg-18
* Disabling all Percona Repositories
* Enabling the Percona Distribution for PostgreSQL 18 repository
<*> All done!
[root@0bbca0f77bff /]# cat /etc/os-release
NAME="Red Hat Enterprise Linux"
VERSION="10.2 (Coughlan)"
RELEASE_TYPE=stable
ID="rhel"
ID_LIKE="centos fedora"
VERSION_ID="10.2"
PLATFORM_ID="platform:el10"
PRETTY_NAME="Red Hat Enterprise Linux 10.2 (Coughlan)"
ANSI_COLOR="0;31"
LOGO="fedora-logo-icon"
CPE_NAME="cpe:/o:redhat:enterprise_linux:10.2"
HOME_URL="``https://www.redhat.com/``"
VENDOR_NAME="Red Hat"
VENDOR_URL="``https://www.redhat.com/``"
DOCUMENTATION_URL="``https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/10``"
BUG_REPORT_URL="``https://issues.redhat.com/``"
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 10"
REDHAT_BUGZILLA_PRODUCT_VERSION=10.2
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="10.2"