Hi,
The service is retired from 20th Sep 2023 so you will not be able to create this service as per Microsoft, check the other thread you have created.Starting on the 20th of September, 2023 you won’t be able to create new Anomaly Detector resources. The Anomaly Detector service is being retired on the 1st of October, 2026.
https://learn.microsoft.com/en-GB/azure/ai-services/Anomaly-Detector/overview#region-support
Hope this helps.
JS
==
Please Accept the answer if the information helped you. This will help us and others in the community as well.