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Fixing the icon in an "installed" web app on Windows with Edge

If you install a web app and the icon is missing or weird, unpin it from anywhere it's pinned and delete the desktop icon.

In Edge, go to edge://apps and pull up the detail page for the app you're trying to fix. If there's a correct icon there, click Create Desktop shortcut.

Hopefully this will result in a shortcut with the correct icon. Then drag this to the task bar if desired.