ARM64 support for Batch jobs on AWS Fargate

Hi,

since AWS announced Fargate support for ARM64 architecture I'm curious if there is any way for Batch jobs running on Fargate to use ARM64. For ECS tasks, we can specify this in runtimePlatform in the task definition. I was looking into the job definition parameters for the same but there doesn't seem to be an option to specify ARM64. I also tried the brute force way of building the Docker image for ARM64 and running the job but it failed with exec format error.

I couldn't find any mention for this topic nor the plans for adding the support (container roadmap).

Thanks