Microsoft's Azure Dev/Test pricing (which offers discounted rates on certain services for non-production workloads, and removes software licensing costs for things like Windows Server in dev/test scenarios) is generally tied to eligible subscription types and Visual Studio/Visual Studio subscriptions, rather than being automatically part of every CSP Azure Plan by default.
Whether dev/test pricing is available to you depends on your specific eligibility and subscription setup — it's worth asking your CSP partner whether your organization qualifies and how to set it up correctly if non-production workloads are a significant part of your Azure usage.