ECR now supports Manifest Lists for multi-architecture images
Amazon Elastic Container Registry (ECR) now supports manifest lists to increase choice of different CPU architectures and operating systems you can use in container applications, for example by adding AWS Graviton ARM instances to existing clusters. Using manifest lists, you can store image variants for different hardware architectures such as x86 and ARM, and operating systems such as Linux and Windows as a single container image in ECR. Clients like docker can then automatically pull the right image variant for each architecture and operating system when starting containers. This helps simplify your build and deploy workflow as you use a single image and tag instead of embedding per-architecture image references throughout your CI/CD scripts.
Source:: Amazon AWS