So, I would recommend you to use its web app version. See: Remove the Background of a Picture with Microsoft Word. Transparent PNG Generator is a free background removal app for Windows 11/10.

Now moving to general availability in Google Docs and expanding to Microsoft Word, Authorship provides students with transparent tracking across virtually all long-form writing platforms.

Even Microsoft Word can open PNGs ... saved as a PNG without being transparent. To make a PNG transparent, you must either remove the background manually (for example with an image editing ...