could able to create clone test case to the test suite but it isn' display in the related test suite

Also to add, that If the cloned test case isn't showing up in the related test suite, ensure that you selected the correct test suite during cloning. Check for any applied filters or permissions that could be hiding the test case, and try refreshing the page (happened to me once). Also you can always manually move the cloned test case into the correct suite or re-add it, it is a bit of pain but may work. 
Hope it helps!

Following below may cause the problem:

1. Synchronization Delay: Sometimes, there might be a delay in the system updating and displaying the cloned test cases. Refreshing the test suite or waiting a few minutes might help.
2. Cloning Process: Ensure that the cloning process is completed correctly. If there are any errors during cloning, the test case might not be properly linked to the test suite.
3. Visibility Settings: Check if there are any visibility or filter settings in your test suite that might be hiding the cloned test cases.
4. System Bugs: Occasionally, there might be bugs or issues within the test management tool itself. Checking the tool's support forums or contacting support might provide a solution.