Good idea & voted 
I’d like to see future transactions rolled up into a single tap area, like as is used for ‘Year in Monzo’/etc., as it is simple and clean.
Admittedly, if you only have one upcoming transaction then the single tap area would take up a similar space, so maybe introduce this ‘roll-up’ only when you have more than one transaction in the same future day? Here’s a mock-up of such a tap area below the card;
When tapped on, the future (greyed-out) transactions are shown in the feed as normal, and the tap area could change to ‘Tap to hide future transactions’ and they roll-up and are hidden again when tapped.