I don't think that's how it really works. That would be super inefficient. I have had my motor replaced twice. Both times the motor was in stock at the shop. The shop only needs a approval from Specialized, not Brose. And the shop is reimbursed by Specialized, not Brose.
Of course I realize Specialized must *also* have an arrangement with Brose. But what I mean is my warranty is not contingent on Brose's support or approval. The contract with Brose is Specialized's concern, not mine. Specialized is the company providing the warranty for the motor, not Brose (this is stated as such in the warranty materials).
And to be clear I'm speaking only of the motor. Most third-party components on Specialized bikes are *not* warranted by Specialized. They are warrantied direct from the manufacturer. It's all
explained here. I haven't yet found a similar explainer from Orbea yet, so I don't know for sure who provides the warranty for the Rise motor.