As I've said before, I'm out there representing Social Security disability claimants. My firm is taking on new cases regularly. I'm only seeing a very few claimants with long Covid. I don't see any more problem with those few cases than with other Social Security disability claims which means there are severe problems.
The letter also said that a couple of more general changes should be made:
... SSA should allow appointed representatives to see all exhibits at the initial and reconsideration disability claim stages. ...
SSA should restore the “treating physician rule” so a claimant’s primary care physician or Long COVID specialist can have their medical opinion given the weight it deserves. ...