I faced similar issue where I needed one entity and its not available nay more in std application. The solution which I tried is as follows
The data entity which is missed on front end, its still available in AOT, so if you have access to a developer ask them to just copy this entity and stagging table and you can use this from front end. You may need to change few properties on entity (something like Deprecated= No).
As Frank mentioned, there is no data entity with this information. The base for such an entity would be checking the status of related inventory transactions. These transactions do have a status and physical (receipt) and financial (invoice) fields.
You can create your own data entity by linking the receipt tables (journal and/or lines) and checking if there are inventory transactions that are not invoiced yet.