To integrate a sim into PowerPoint, you need to make a video from the sim. On iOS, you can use the built-in video record option of SimsUshare. On Windows and Mac, you can see this guide for making a video using 3rd party tools.
Once the sim is a video, you can incorporate it into a PowerPoint slide just as you do with other videos.
Note: To make a ‘walkaround’ using PowerPoint, make videos for each view, then put each video on its own slide. Next, make arrow shapes and hyperlink them to the correct view. This will allow you to walk around a scene. One important caveat, though: when you start a slide, it will automatically start playing the video. However, if you leave the slide and then later return to a slide you’ve seen already, the video will be paused. You will need to click on the picture to start the video. This is a limitation of PowerPoint and videos.