You can now view AWS Tenancy, AWS Availability Zone, AWS Platform, CPU Architecture, and the Tags associated with an instance from the action item overlay.
From instance's action item overlay, click on Additional Information to expand and view Instance Details. You will now see AWS Tenancy, AWS Availability Zone, AWS Platform, all Tags, and CPU Architecture associated with the instance.
Below Instance Details, navigate to the Tasks section. Under Additional Information for each task, you will find the CPU Architecture for the current and recommended machines.