I made sample application at https://github.com/Tomas-Kraus/jpa-ora-storedproc

It requires Oracle DB image build using https://github.com/oracle/docker-images/tree/main/OracleDatabase, I used 21c EE version.

Oracle DB properties are in oracle profile of appl/pom.xml. Change hibernate-core version to 6.1.3.Final

mvn -Poracle,docker verify