This morning I made an alt just to pass the time and while I was at my mog mail I received everything except the Bennu mount I purchased last week. Im very sure that on the mob station this mount is account wide similar to the Sleipnir horse (on an additional note I got my Sleipnir) although I can't triple check this since I'm at university right now.
Is it meant to do this or does the account wide on this item specifically only apply to characters you have made at the time of purchase, if so thats very shady SE.
Edit: yes I waited, around two hours to be specific and I used the force SE mail option at the top but nothing.