You can now use the Ad Optimizer in all countries where Amazon Advertising is available. We have added Australia (AU), Belgium (BE),  Brazil (BR), Japan (JP), India (IN), Mexico (MX),  and Singapore (SG).

You can now add and manage entities from these countries, as well as create and manage campaigns, portfolios and budgets. 

Please note:

The reports Product Insights and Search Term Insights are currently not available for the newly connected countries.