Quick Sight Dashboard - Not all account IDs are reflected in dashboard

There could be several reasons why not all account IDs are reflected in your QuickSight dashboard:

1. Ensure that the data source used by QuickSight is correctly configured to access the data from all relevant accounts. Check if the permissions and settings are correctly set up to include all accounts.
2. Verify if the data refresh settings are correctly configured.

If the data is not refreshed regularly, it might not include the latest information from all accounts.

3. Check if there are any filters applied in the QuickSight analysis or dataset that might be excluding some accounts.

Filters can be set at various levels, so it's important to review them thoroughly.

4. Ensure that the IAM role or user used by QuickSight has the necessary permissions to access the Security Hub data from all accounts.

The role should have the securityhub:GetFindings permission along with any other required permissions.

5. If you are using a delegated account for Security Hub, make sure that the cross-account access is properly set up. This includes ensuring that the main account has the necessary permissions to access data from the member accounts.
6. If you are aggregating data from multiple accounts, ensure that the aggregation process is correctly set up and includes all the accounts.
7. Check if there are any resource limits or quotas that are being exceeded, which might prevent some accounts from being displayed.
8. Ensure that the data from all accounts is consistent and in the correct format. Sometimes, data quality issues can lead to certain accounts not being displayed.