When I tried docker pull this is what I see, very similar to @vbeskrovnov comment:
$ docker pull docker.elastic.co/wolfi/chainguard-base:latest@sha256:973431347ad45f40e01afbbd010bf9de929c088a63382239b90dd84f39618bc8
Error response from daemon: pull access denied for docker.elastic.co/wolfi/chainguard-base, repository does not exist or may require 'docker login': denied: requested access to the resource is denied