@Anh Tran I've just stumbled across the example that is given: https://metabox.io/plugins/mb-custom-table/.
The amount of rows added for one order is worrisome, so I was thinking of using MB Tables to reduce the number of rows required -- just like your example states.
From your response here, I understand it's not even possible to achieve this with MetaBox? If yes, why is it even presented as an example?
If it is possible, could you please provide an example?
Thank you!