The flight is cancelled if Swiss cancels it, it has nothing to do with whether you can get to your destination by some other route. There are plenty of reports of people receiving travel vouchers rather than their cash back. See the LX forum for more on this. I suspect the same applies to your upgrade cost, unless you used a ‘creative’ way to do this (not sure). Finally, are you sure you would have been able to travel anyway given entry and transit restrictions?