For anyone who’s looking for an easy way to get to this figure, while Monzo works on this, the Quids app displays the total debits + credits per day…I’ve shared a screenshot in this post -
https://community.monzo.com/t/monzo-desktop-app-quids/7057/22?u=alexs
And there’s a link to download the app, for Mac users, at the top of the post…