Here’s the mockup I did from the other thread - it’s a bit whacky in places (a better explanation in the link) - but I’d see an option to breakdown a transaction, either automatically (as in the Lidl transaction, where the receipt for two purchases is coming through), or manually (as seen in swiping left on the McDonald’s transaction and revealing a “Breakdown” option). You’d then be able to add tags, categories etc by different parts of the overall transaction.
I think it’d be cool and a winner. Particularly if Monzo could lead the development of an open standard to pass receipt details through to banks as part of a transaction.