Yes, since unemployment might hit 20%, it would mean 20% of payments to SS are not available. (12*20%= 2.4)
So for each year of Covid-19 it would shorten 2.4 months off the 14 yrs left in normal SS payments.
Now this will be somewhat corrected by the death toll of a year of Covid-19, given close to 80K old folks so far in about 4 months, we can figure a non-payment needed to 240,000 old folks that die of Covid-19.
The net effect will be per year of Covid-19;
less than 2.4 months of SS normal payment shortening off the current 14 years.
Covid-19 would have to go for 5 years to cut 1 year off the normal SS payment schedule which is 14 years long.
I'm not worried.