Shulkerboxtooltip -

While primarily client-side, installing it on a server enables extra features like Ender Chest previews. Configuration and Links

Beyond Shulker Boxes, it can preview other containers like chests, furnaces, barrels, and even modded storage if they have been "picked" in creative mode. ShulkerBoxTooltip

Opens a "Full Preview" showing the exact slot placement of every item stack. While primarily client-side, installing it on a server