We are not able to find EntitySubscription object in the partner developer org which is created in Partner org. This is the developer org we created using Environment Hub option. We are planning to list one of our app in AppExchange.
We already developed Apex classes in our free developer org which access and uses EntitySubscription object. But the above one does not. Any thoughts please?
Update: (added screenshot for the workbench) It does not have EntitySubscription Object.