How to bulk activate or publish the content pages in AEM aa CS

AEM Bulk Replication Process in AEM aa Cloud Service

1. Publish using content tree workflow
1. For bulk publishing content, use the Publish Content Tree Workflow. This workflow step is specifically designed for Cloud Service and efficiently handles large payloads. Avoid building custom bulk publishing code unless necessary. You can trigger this workflow via existing Workflow APIs.
2. For this, login to AEM >> Tools >> Workflow >> Models and copying the Publish Content Tree out-of-the-box workflow model, as shown below:

References:

1. https://experienceleague.adobe.com/docs/experience-manager-cloud-service/content/operations/replication.html%3Flang%3Den#publish-content-tree-workflow