The camera has two focus modes: "Specified Frame AF" and "Face Tracking AF". The latter is activated by default and recognises people's faces. Animals or other objects cannot be used.
You can find more information in this video: Canon PowerShot V10 Tutorial - Autofocus
I use it regularly, I can't confirm that it overheats, but it switches off after one round of recording. I record my podcasts with it. And the battery doesn't last very long either
Unfortunately, I don't have any information on this. However, you can always contact customer service to ask for this, and they will then be able to make a request to the supplier :) https://helpcenter.digitec.ch/hc/fr/requests/new