There’s been some previous discussion on this, during which RichardR did a mockup in his pre-Monzo life
https://community.monzo.com/t/ebay-paypal-transactions/1502/7?u=jzw95
and Hugo approved!
https://community.monzo.com/t/ebay-paypal-transactions/1502/10?u=jzw95
But nothing since. 
https://community.monzo.com/t/ebay-paypal-transactions/1502/12?u=jzw95