Crane is a very helpful too for this: https://github.com/google/go-containerregistry/blob/main/cmd/crane/README.md

Docs: https://github.com/google/go-containerregistry/blob/main/cmd/crane/doc/crane.md

crane catalog localhost:5000 #lists repo
crane ls localhost:5000/repo/image #lists tags for an image
crane digest localhost:5000/repo/image:tag --full-ref #gets the reference for the tag
crane delete localhost:5000/repo/image@sha256:someref