I tried to use /libs/wcm/foundation/components/text, inline editor, pasting it into the page, and it works.
From sightly, you can use ${properties.text @ context='unsafe'}. Interestingly it saves the images as a BASE64 string, and positions all margins accordingly. the text looks okay as well.
This text component is legacy, but it should that you can paste a copied clipboard of powerpoint into the page, and it works as expected.