If I understand correctly, this means mocking playbook triggers for incident types. If yes, then the answer is no. Playbook triggers for incident types are not a part of the debugger.
If the question was meant to be for "Playbook Triggered" header to mock inputs and outputs, please reference the answer in - https://live.paloaltonetworks.com/t5/cortex-xsoar-discussions/question-from-quot-a-developer-s-guide...
You can set defaults directly in the playbook triggered header.
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