Amazon EC2 On-Demand Capacity Reservations now support Group Targeting
Starting today, you can target EC2 Capacity Reservations within an AWS Resource Group using the Resource Group ARN. With this feature, you can now use Capacity Reservations seamlessly for workloads that span Availability Zones and multiple instance types. This feature integrates seamlessly with EC2 Auto Scaling and EC2 Fleet.
Source:: Amazon AWS