I know several dozen people. One person who is still unable to work after COVID in late 2021, and a fair amount of people, myself included, whose condition substantially worsened for indeterminate reason during the last few years.

Most likely, the majority of people who are damaged by COVID aren't cases severe enough to label as "long COVID", and often just passed off as having become more depressed due to social distancing, etc. except they then don't recover with lifestyle improvement.