Here is the issue I have faced recently.
Created a custom entity in the Dev environment and selected Areas to Display as “Service”
Create a Solution in Dev env and added the new created entity to it.
Exported the solution and imported it in the Test environment.
After the import was successful, I have published all customizations but I was not able the newly created entity in the Service area. Opened customization and found that in Areas to Display the checkbox was unchecked.
For resolving the issue, I have added SiteMap to the solution. Exported and imported from Dev from Test.
Hope this helps.