Workflow for transferring local image between different architectures?

[hashkool]

I have trouble tranfserring a local cross-platform image from amd64 (local) to arm64 (remote) via podman image scp.

Podman does not detail that podman image scp does not work cross-platform. I am not sure if I need to push the manifest separately (how?) or that I found a bug.

The cross-platform image was built with buildah using the sample from the docs.

build() {
  manifestName=bla
  container=$(buildah from --arch $1 docker.io/procustodibus/wireguard)
	
  buildah run stuff

  buildah commit --manifest $manifestName $container
  
}
build arm64
build amd64

Then I do an podman image scp to transfer the image.

Locally, I can inspect the manifest with podman manifest inspect bla:latest. It shows 2 entries, both am64 and arm64 are listed.
If I do the same on my remote machine , I get

Error: reading image "docker://localhost/bla:latest": pinging container registry localhost: Get "https://localhost/v2/": dial tcp 127.0.0.1:443: connect: connection refused

The remote machine does have the image, but inspection reveals its architecture as amd64, which does not match arm64. I do indeed get Execution format errors.

local podman version 4.5.1
remote podman version 4.3.1