No, I'm saying I don't see why we necessarily need to add it to the global shop if we can get it in game if it's only used for decoration. I can't think of any decoration items we have in global now but if there are please mention it. Can't get on currently since I'm staying at my dad's this week and I don't get stable FPS on Minecraft to check the global shop list.

Also it would be very limited stock from what I know of the global shop, people probably wouldn't be wasting silk touch on it if it was available normally through that to sell it to the global shop. From what I known of when I buy out something in the global shop, like gunpowder/etc, it only restocks itself up to 250 of an item unless people are selling to it. And I don't know when it restocks itself, I think at least twice a day.
That's very minimal stock for 77+ players that are usually on at any one point in time, especially if you don't know when it's going to restock. And considering it seems like only a decoration item people might want large portions of it when they actually buy it. There would also be a large problem of what price it should be at as well.
Considering Mycelium and Grass aren't in the global shop but in the VIP shop, I also think that it has a higher chance of only making it into the VIP shop with a good argument, not the global shop.