No. Enterprise Distributed Application Service (EDAS) does not support vertical scaling of Elastic Compute Service (ECS) instances, such as changing from 1 core and 2 GB to 2 cores and 4 GB.
Alternative: horizontal scaling
To increase application capacity, add more ECS instances to the cluster instead of resizing existing ones. This process does not affect the running of existing services.
For detailed steps, see Scale out an ECS cluster in the EDAS console.