LCM-based deployments and the installer for Aria Config ship with Postgresql 13. As this is a third-party component, it is important to be aware of its official support lifecycle.
For all end-of-support details for Postgresql versions, please refer to the official Postgresql versioning page: https://www.postgresql.org/support/versioning/
Tanzu Salt - all versions
Aria Config - all versions
Aria Config is compatible with more recent versions of Postgresql, and it is currently recommended to run Postgresql 15.
The official support lifecycle for Postgresql 15 and all other versions can be verified by visiting the official Postgresql versioning page: https://www.postgresql.org/support/versioning/