No fingerprint scanner - I can't secure my account

Hi all,

I recently upgraded to the Pixel 4 which uses face ID to unlock the phone, replacing the fingerprint scanner.

I liked having the option to require a fingerprint to open the Monzo app, and would like to have the same functionality with face ID but have been told this is not available.

Is this a feature I could see being implemented soon? It concerns me that anyone using my phone has access to my banking.

Thanks