Memoji stopped working

Thanks for providing the alert. Test this in different light, and with different backgrounds. It's possible something is confusing the camera. About Face ID advanced technology - Apple Support

"Face ID requires that the TrueDepth camera sees your face, whether your device is lying on a surface or you're holding it in a natural position. The TrueDepth camera has a similar range of view as when you take a photo or make a FaceTime call with the front camera. Face ID works best when the device is arm’s length or less from your face (25-50 cm away from your face)."

If you still have issues, also check the info and troubleshooting here: If Face ID isn't working on your iPhone or iPad Pro - Apple Support

Thanks.

Hello Realsarahjane,

Thanks for asking the Apple Support Communities for help with your iPhone and Memoji.

Please start here: Use Memoji on your iPhone or iPad Pro - Apple Support

Also check your settings: "If you want your Memoji on all of your compatible devices, you need two-factor authentication enabled for your Apple ID, and you need to be signed into iCloud with the same Apple ID on all the devices. You also need to have iCloud Drive turned on. Go to Settings > [Your Name] > iCloud > iCloud Drive."

If necessary, delete and re-add your Memoji. Let us know if you get any alerts or error codes, or if you have other issues such as Face ID alerts or problems with purchases using Face ID. Thanks.

Of course! Please contact Apple Support for more assistance with this: Contact - Official Apple Support

Thanks.