Hello Junheok Cheon,
Thanks for Reaching the Microsoft Q&A Forum.
When you update the index in Azure AI Search by adding or deleting documents, those changes will be reflected in the endpoint's responses immediately. The Azure AI Search service supports real-time updates, so you don't need to redeploy the endpoint for these changes to take effect. The endpoint will automatically use the updated index data when processing queries. This means that any new information or removed documents will be considered, allowing the endpoint to generate responses based on the most current state of the index without needing a new deployment.
Thank you!