Agree with this.
It’s mad that monzo haven’t fixed this for iOS / Face ID already.
Also, unless it’s been fixed, there’s a very similar issues with shared tabs, where the settle up button prompts the app the scan your face and send money - no confirmations, no indication of the amount. I managed to send a friend £200 by accident.
And, yes, I’ve also cancelled a direct debit by mistake before now.