First make sure you have/still have the WYZE skill installed in your Alexa app
After ensuring its there or installing/reinstalling go back to the main/home page of the Alexa app and go to devices.
Next find the camera that has Cam Plus or the older Person Detection(only V2 or Pan Cam, if opted in) licenses associated to them.
**Keep in mind the V3 cameras and Wyze Cam Outdoor do not have a live view so if you click on them you will be taken right to the settings page. As shown in @WildBill s example above.
The V2s and the Pan Cam have live views once you open it you will be taken to the live view and will need to click on the gear to the top right to get to the settings
There you can toggle on the the Person Announcement setting as shown in WildBill’s example.