PowerPoint should give face recording function.
Thanks for sharing this feedback with us. In PowerPoint if you go to Slide Show > Record Slide Show, a camera will pop up in the lower-right corner that shows your face as you record. Here's some more information on recording in PowerPoint (https://support.office.com/en-us/article/Record-your-screen-in-PowerPoint-0b4c3f65-534c-4cf1-9c59-402b6e9d79d0). Please continue to leave your feedback here.