A family of Microsoft presentation graphics products that offer tools for creating presentations and adding graphic effects like multimedia objects and special effects with text.
In PowerPoint for macOS, you should be able to right-click on the group of shapes and choose Save as Picture, then choose the SVG format. Are you not seeing that format?
If not, do you see PDF format? If that is available, save as PDF, then convert to SVG using the free program InkScape.