Looking at the icons she used, they are from the older format (not the new icons we’ve had for a few months now). I’m wondering if she has those from one of her training courses.
My solution on how to get the icons into the template would be to use a tool like snipit, and just ‘clip’ the image from PowerBi onto a clipboard, then copy into the template.
I was actually playing around with it using the Screen Clipping tool from PowerPoint (on the Insert tab of the ribbon):
The only problem with this is I don’t get good resolution on the images, so they pixilate as they are enlarged. 
I’m searching now to see if MS has a good screenshot of the current icons that I can grab and manipulate. Will let you know. If I find a solution, perhaps we can add to your template for everyone.