You can move around Appliances, Tables, Décors, Soil boxes, and Trees.
To do that, tap and hold the item you want to move or rearrange. Drag it to the new location where you would like to place it.
If a green background surrounds it that means that the new location works fine. When a red background surrounds the item, it means the location is not appropriate and you need to move it until the background turns green. Select the green tick mark when you are happy with the new place to confirm.