The face Id in the digi-payment app helps you to make payments without the need to first gain access conventionally. This saves time. However, if you’re not able to use the feature, then you can check some tech support sites for answers. Cash App have a number to support you when you face issues. You can check it out on the support page of the app. https://www.monktech.us/cash-app-customer-service-phone-number.html