I'm storing my docker images in my private Google Container Registry and I want to interact with the images through registry V2 APIs, such as getting tags of an image (/v2/:imageName/tags/list). I believe that it is supported, according to this link But I cannot found related documentation. Can anyone help me?
Indeed it is (including that endpoint). You should be able to interact with it after authenticating in the standard way outlined here.
Feel free to reach out on gcr-contact@google.com also if you have any troubles.