Monzo are currently redesigning the Payments tab and they’ve mentioned the main idea behind the redesign is that you “shouldn’t need to know if the person you’re sending money to has a Monzo account, or if you have their phone number” so it looks like the “Recents” section and the “Pay someone on Monzo” section are being combined into a unified payee’s list.
https://community.monzo.com/t/redesigned-payment-screen-early-preview/60826/18?u=awjdean