That is simply not true and just speculation - especially for a disease that has been around for less than a year. Most of the studies that reported things like heart damage and other kind of side effects were retracted, but the retraction never made it in the press and social media, just the initial poorly ran studies that got hundreds of thousands of shares. One of the so called long COVID studies was done through people recruited through Facebook groups and Reddit communities, all of them having self reported symptoms, but none having actual positive tests.