How do you actually separate CI/CD pipelines for AKS across dev/qa/uat/prod in Azure DevOps?

Hey Folks, need your advice badly , I'm building out a CI/CD flow for AKS using Azure DevOps Pipelines (not ArgoCD/GitOps for this one, using native Azure Pipelines + KubernetesManifest@1 tasks). Trying to understand what people actually do in production. The MS Learn sample bundles CI and CD into one pipeline (Build stage → Deploy stage, same YAML file), which builds once and deploys straight to the cluster. That seems fine for a sing