Hi Nick,
First, my pleasure to assist you.
As per your description, please don’t worry, we can work together to narrow down and resolve the situation.
As a simple workaround I think you may do manually, (you can overlay multiple images using the same below process in PowerPoint. Just make sure each image outside of the base has a transparent background.
To overlay images in PowerPoint, e.g., open your presentation or start a new presentation. Select the slide you wish to edit and click on the area where you want the picture to sit. Click Insert then Pictures and select the primary picture.
The picture will insert to the slide, and you can resize by dragging the corners. You can also click and hold the cursor on the photo to drag around the slide until the location is perfect. Then click on the picture and repeat the photo insert process for the second overlay image**.** Now drag the corners to reach the desired size and drag the photo around the slide until the desired position is achieved.
I appreciate your understanding and stay safe!!
Best regards
Waqas Muhammad