square.onOrderCustomAttributeDefinitionVisibleUpdated subscribes to order.custom_attribute_definition.visible.updated for the selected seller. It requires ORDERS_READ.
Example
automations/square-on-order-custom-attribute-definition-visible-updated.automation.ts
Event
A custom attribute definition that’s visible to your application was updated. The signal resolves to the officialSquare.OrderCustomAttributeDefinitionVisibleUpdatedEvent payload with type narrowed to order.custom_attribute_definition.visible.updated.