Is App Runner (ECR) compatible with ARM64 CPU architecture?

When deploying an application in App Runner through an ECR image I'm getting the following error inside the container: "exec format error". The docker image was built on a MacBook Air M1 laptop. After some googling, the error message seams to indicate an issue related to the cpu architecture.

I found support for ARM64 in ECS (https://docs.aws.amazon.com/AmazonECS/latest/developerguide/ecs-arm64.html), but it requires some special configuration on the task to indicate the cpu architecture. I can't find documentation that explains if ARM64 is supported by App Runner or not.

In case it is not supported, it will be great to have this kind of information in the App Runner FAQ or a limitations page in the service documentation.