The pets from Celestine show up in a preview window (control+click on Mac), but the Ohuna mount does not open a preview window at all.
It’s not currently in your mount journal either. The same goes for the Renewed Magmammoth that you get from using 20 Charred Elemental Remains
once you purchase it, it also does not show up in your mount list either, you have to use the macro: /cast Duskwing Ohuna. I think this is also a bug.
I think this part may have been fixed, as the Renewed Magmammoth had the same bug and now shows up in the mount journal. However, I wouldn’t be shocked if Ctrl-click previewing for both mounts is still bugged, because the preview in the mount journal is currently bugged.