The Power Point doc is editable except that the theme used doesn't allow editing of the highlighted words in Power Point. For that, you have to use a Google Slides version.
Here is [a copy of the presentation in Google Slides that is editable][1] so you can make a copy of it and edit for yourself. Here is [the original slide deck on google slides, in a view only link][2] (to ensure the original stays intact!).
[1]: https://docs.google.com/presentation/d/12IDp9P1ZeDHMZl5dQWfTndCWhDbM4pkHQIMTu9QlLYE/edit?usp=sharing
[2]: https://docs.google.com/presentation/d/1n65QqJAeefEkSdm85H6C8dmQvI8sjUDfBTI4n1mKYAI/edit?usp=sharing