Pump failure but there still being fuel that could manually taken by taking tank out would result in less of a punishment. This sounds like there wasnโt 1L of fuel to extract for testing but the parts worked
There needs to be 1L of fuel available for the FIA to test to ensure all fuel is within the regulations. Less than 1L won't be enough to properly test it.
Not sure if anyone has been disqualified from qualifying before but two years ago Vettel was disqualified from the Hungarian GP for not having enough fuel