For pgpool on RHEL9/Centos9/OL9. Use will need to enable following repos on repective OS.
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Enable on centos-9
sudo dnf config-manager --set-enabled crb

Enable on oracle linux 9
sudo dnf config-manager --set-enabled ol9_codeready_builder

Enable on rhel 9
dnf config-manager --set-enabled codeready-builder-for-rhel-9-x86_64-rpms

For resolving dependencies of percona-devel packages on RHEL8/Centos8/OL8.
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Centos 8
sudo dnf config-manager --set-enabled powertools

Rhel 8
dnf config-manager --set-enabled codeready-builder-for-rhel-8-x86_64-rpms

Ol-8
sudo dnf config-manager --set-enabled ol8_codeready_builder