List of hardcoded tables which will be excluded during clone is as follows:-
Any tables with the attribute "no_replicate=true" will be excluded by default.
*** Please do not change this attribute from OOB as it can have adverse effect on the functionality. Please raise your query to customer support if you have any follow-up questions.
In addition to that there are a few tables which have instance specific details/data.
****There is a possibility that some of these tables will not be available on your instance and that is expected.
Above tables if present on the source instance will be excluded OOB during a clone.
This KB have more information on the skipped notifications on the clone change:-