Currently it is possible to use the Contract Performance grids to check if a Product has been invoiced. This involves a decent amount of work and clicking back and forth if a Project Contract has tens, not to mention 100+ Order Lines for Products.

I would like to suggest that a field is added on Order Lines (for Products) to indicate whether a Product is invoiced or not. Ideally this field would follow the logic of the Billing status ID field (msdyn_billingstatus) of the Actuals entity so that the field's behavior is similar to what is seen on Actuals.