Hi @yohan,
Oracle 23c on-premise has not yet been released but is planned for the first half of 2024. However, we will schedule support for it as soon as the on-prem variant is available.
You can track the status here:
Support for Oracle Database 23c LTS · Issue #4001 · camunda/camunda-bpm-platform · GitHub.
Stay tuned!
Best,
Tassilo