I’d find that useful too!
Hugo (Monzo’s Head of Design) isn’t keen on displaying the total spent for each day in your feed but he is developing the pulse graph to make it easy for us to see this figure there -
https://community.monzo.com/t/total-spent-per-day-1/2643/6?u=alexs
the other commonly requested feature that’s related is the running balance & that might end up looking something like this -
https://community.monzo.com/t/display-running-balance-with-each-entry/6832/22?u=alexs