Use MSIX instead of Squirrel.Windows
Embrace your own packaging technology instead of using Squirrel.Windows.
Squirrel.Windows is really bad for enterprise deployments: The hacky workaround for installing in device/ system context is janky.
MSIX is also multi platform according to your documentation, shouldn't that make it fit for the purpose?
Another positive impact would be that Teams could come to Microsoft Store.
Maybe just make it a PWA while your at it, it's running Chromium backend anyways.