Absolutely! With the Partner Plan the sponsor can pay for Apprentix and can add unlimited number of employers. As the Program Sponsor, that will then give you access to view all employers, their apprenticeships, and their apprentices.
To put this another way... You might have 1 Program Sponsor that has chosen to sponsor multiple companies with their apprenticeships. Let's say there are 3 companies. Each of them want to create an apprenticeship, and the Program Sponsor is going to support all 3 of those apprenticeships. Since those are 3 separate companies, they might each want to have access to their own apprenticeship. With the Partner Plan, there are multiple "Clients" created inside of the account. Each of those "Clients" can host single or multiple apprenticeships. The "Client" admin's will only see their own apprenticeship.