It's an expensive option because it relies on the Apple Watch, but Watch unlock can be handy as a backup to Face ID. The Watch notifications for Watch unlock mi

It's an expensive option because it relies on the Apple Watch, but Watch unlock can be handy as a backup to Face ID. The Watch notifications for Watch unlock might also help you get a sense of what seems to be trying to unlock your phone. It's probably the notifications on your lock screen triggering a Face ID check in case you want to read what they say. You could reduce the number of notifications that you receive, or use a Focus Mode while at work, or keep the phone in a pocket or face down/in a dark place.