I have a similar issue.
I would like to create product quotes and invoices from an Airtable product base, and I am quite surprised that the default is not having EACH field dragged to the artboard/grid function as separate lookup!
The “selling” page for the Designer Page block shows what appear to be independently functioning fields (in terms of lookup/return function) on an invoice example, but I can find no straightforward way to get that result.
To my way of thinking, each field dragged to the artboard grid should default to independent lookup, unless we override that feature (I can’t right now conceive of a reason why anyone would want a page full of one record repeated over and over again, but perhaps there is one).
In other words, once placed on the page, I ought to be able to click, search, and then bring up a different model number for each field on the page, that add fields for a price from the same base, and then add a formula to multiply the cost by the quantity. These fields would all be arranged on the page in a table in a customary way that is instantly recognizable to most individuals in business.
If this most common implementation/format of an invoice is not possible without significant coding and customization, then I would recommend that they use a different example on the selling page.