Also I recommend having a look here: https://airwebreathe.org.uk/doku.php?id=wine_icons

If you look at the archive, you can see there are icons adapted to different pixel grid sizes, which is a manual artistic process that ensures the icon is crisp, not blurry at small sizes.
I tried, and I did retouch it to reduce the most glaring errors. But I am not an artist.
In Wine the [buildimage](https://gitlab.winehq.org/wine/wine/-/blob/master/tools/buildimage?ref_type=...) script uses special ids in the SVG to separate a single SVG file into images within the ICO file.
Perhaps that should have been called out in the wiki article about icons.