how to create proxy cache items that result in oci with list of artifacts for supported architectures

[mdavid01]

Trying to pull a multi-architecture artifact as shown in the pic. It's a proxy-cache artifact from ext.hub.docker.com. I have no idea how this artifact was created but I want to create a similar artifact from a different tag.

For a test case, I want to pull harbor...com/ext.hub.docker.com/cnfldemos/kafka-connect-datagen:0.6.2-7.5.0 into the proxy cache. The pull request only ends up with a single image for the linux/amd64 platform and no tag.

How do I get all the kafka-connect-datagen:0.6.2-7.5.0 platforms under one oci artifact as shown in the first pic?

[stonezdj]

It is manifest list, because of the issue of #20920, it will create the result of the second screenshot.