Multiple Workspace and Schema

Oracle Apex 22 and DB 19c

We have multiple developers in Oracle Apex and we have following requirements, for which we need guidance on how to manage the Apex model in terms of applications creation..

1) We need to maintain security that Data for any specific application cannot be seen by other developer in test or in Prod

2) We sometime assign the application to another developer for maintenance, so the model should support interchanging the owner of applications and maintain data security as mentioned in point 1

Any suggestions on how to manage the application models in terms of Workspaces and Schema to achieve this.