Nevermind, found it. This is the link for future immigrants: https://www.canadavisa.com/canada-immigration-discussion-board/threads/linking-pr-card-application-to-track-pr-card-after-landing-flagpole-landing-interview-is-complete.617040/
Yup, ghost update. Most likely, it is a very positive sign at this stage. I saw few members who were given dates of 17/19 May for updates (I think it means PPR shower), so you could expect it during these dates, if not before.