The shared tab feature is the best feature on Monzo and is especially helpful when booking trips (and spending on trips) away as it ensures that everyone is paid and noone is left out of pocket with its auto calculating of who owes what.
It has its flaws, however. It would be very handy to be able to click on a payment which is put in a tab to see who was allocated what cost. It can be the case that some people need to pay slightly more or less and therefore the tab has to be adjusted. It would be extremely helpful to see how this has been allocated between the group.
It would also help in identifying if the person adding the payment has spread the costs fairly and not just let others pick up their tab!