TouchChat released a new public beta head pointing feature that is built into the TouchChat app version 2.18.0. After you update to version 2.18.0, go into the TouchChat settings and enable head pointing.
This head pointing feature will only work if you are using an iPad Pro 12.9-inch (3rd generation), iPad Pro 11-inch, iPhone XS Max, iPhone XS, iPhone XR, iPhone X, which all have facial recognition capabilities.