Unable to register customers/data_request webhook

When I am going to register customers/data_request webhook, then it’s showing “invalid topic specified: customers/data_request”.

My scopes are below:
read_customers,write_customers,read_orders,write_orders,read_order_edits,write_order_edits,read_products,write_products,read_product_listings,unauthenticated_read_customers,unauthenticated_write_customers,read_draft_orders,write_draft_orders,read_merchant_managed_fulfillment_orders,write_merchant_managed_fulfillment_orders,read_third_party_fulfillment_orders,write_third_party_fulfillment_orders.

Please suggest what I need to do. My main scope of work is to setup GDPR mandatory webhooks for listing my App.
Thank you.