Renaming an application and all objects in multiple environments

I need to rename my main application and all of the objects in the application (about 600 objects).  This application exists in dev and has been deployed to QA, Stage and Prod environments, all of which are cloud and on version 20.3. 

  1. To rename the application, do I rename it in each environment manually, or is there a different best practice for renaming apps in multiple environments?
  2. Is there an efficient way to rename all objects in an application, or is the only way to rename each object manually?
  3. After renaming the application and its objects in my Dev environment, will this cause any issues with deployment to higher environments? What best practices do I need to consider in this scenario?

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