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Permission-based Ender Chest Access Control
Players now need to have an Ender Chest in their inventory to open it via the /ec command by default. This behavior can be overridden using the new permission node:
quickec.open.ignore_inventory – Allows players to open their Ender Chest regardless of inventory contents.Right-Click Ender Chest Opening
Players can now open their Ender Chest by right-clicking while holding one in hand. Sneaking while right-clicking will place the Ender Chest instead. The following permission node controls this feature:
quickec.open.click – Allows players to open the Ender Chest with right-click.Note: I am not sure about backward compatibility below 1.19.

command to use enderchests.