Auto-tune in openserach service does not start

There are a few reasons why autotune might not have taken any actions yet, even though it's been 3 days:

1. Not Enough Data: Autotune needs to gather performance metrics in order to make recommendations. It might need more data, especially if your off-peak window is narrow or your cluster traffic is low. This could take a few days to gather enough information.
2. Off-Peak Window Timing: Can you confirm that at least one iteration of your off peak window occurred in the last 3 days?.
3. Unsupported Configurations: Instance Type: Autotune isn't supported on T2 or T3 instance types. OpenSearch Version: Ensure your OpenSearch version is 6.7 or later

Are any autotune events being created? https://docs.aws.amazon.com/opensearch-service/latest/developerguide/monitoring-events.html#monitoring-events-autotune