Not quite sure what you are after but its clear from the Archimate Spec V3.01 and the book, Enterprise Architecture at Work. A stakeholder gets some value from a product. The product as you say consists of business services, business object and contracts. The business services serve actors and the services are realised by business processes.
OK here's a very narrow example. Let's say at the motivation layer we have a Stakeholder called "Government" who has a driver of "Cheaper Government services". Which leads to a Requirement for cost effective Internet access.
At the Business layer we have a Product "Government Worker Internet Connection" that realises the Requirement. It contains a Business Service "Government Worker Internet Connection Service", a number of Contracts that represent the legal contracts and SLAs et al, and a number of Business Objects that represent reports and bills etc.
At the Application Layer there are internal elements that represent internal functionality with minimal interaction with the customer's own application layer.
At the Technology Layer we have a number of Technology Services that the customer does interact directly with.
Now for the interesting bit. I want to represent at the business layer that the product/serve is constrained only to being used by a living human being employed by the government and can not be used by an autonomous software agent or a hardware agent (server etc). I don't want to map these restrictions at the Application or Technology Layers as my internal workings at these layers needs to be invisible to the customer.
The actual situation is far far more complex. But I want to get to somewhere where it is obvious what a solution is solving :-)
Okay that explains a bit. Your working for a telco providing a technology service to Government. Thanks for the heads up on getting cheaper internet services

Not sure if I'd model that at the business layer. I'd be tempted to model it something like this.
Stakeholder: Government
Driver: Cost
Assessment: Internet Service too expensive
Goal: Reduce Internet Services Costs
Requirement: Provide competitively priced internet service to Government
Work package: Create a Competitively priced Internet Service for Government Workers.
Technology Service: Government Internet Service
Technology Processes: Subscribe to Internet Service, Install Internet Connection, Consume Internet Service, Unsubscribe from Internet Service
Technology Object (Fact): Type of Internet User [Human|Machine|...]
Technology Object (Fact): Employment
Technology Interface: Internet Connection
Technology Function (business rule): Allow Connection -{When connection requested if human AND employed by Government then connect else do not connect.}
The consumer of the service sees the technology service and interface but nothing else.
As a Government Enterprise Architect I could then show how Government Products and Services can utilise such technology services.