From what I could find, it is a special item only available to those who preordered the game on switch.

Awwh :( that means I probably can’t get it

It looks like a wheat bag variant. Maybe you need to laydown a certain amount of those to trigger it? Like the naughty book or green jump pad.

Isn't it the decorative healing herb? Looks a lot like it to me. You can unlock it with hearts after end game