I think the most common tools for similar workflows is Google's crane[0] and Red Hat's Skopeo[1]. It might be slightly more low-level than most developers want, though.

[0]: https://github.com/google/go-containerregistry/blob/v0.20.7/...

[1]: https://github.com/containers/skopeo

This project even depends on go-containerregistry. Also in this space is RedHat's scopeo, Microsoft's oras, and my own regctl.

And my favorite project for inspecting layers is Jon's https://oci.dag.dev/.