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Under the "Waiting for a response" section (https://docs.n8n.io/integrations/builtin/app-nodes/n8n-nodes-base.whatsapp/#approval-response-customization), "Response Type" could be a "Custom Form". This looks a vert powerful feature to extend the capabilities of user response.
However, the page lacks any relevant example which could demonstrate how one can use this feature.
The generic examples available under "Templates and examples" section do not explain this feature.
Kindly add more details on this to make user understand this seemingly powerful feature.