HDMI to VGA conversion, even through displayport connector, is much simpler topic than properly handling USB-C feature negotiation, and as I mentioned in anothe

HDMI to VGA conversion, even through displayport connector, is much simpler topic than properly handling USB-C feature negotiation, and as I mentioned in another comment, it was common for USB-C dongles to exhibit problems, especially on macOS (non-Apple branded dongles tended to have better success rate on non-mac systems, Apple-branded dongles were consistently problematic on everything). Usual case was that with dongles, the display wasn't detected, at all, and having spent quite a bit of time fiddling with it, it didn't seem fixable.