Because nobody sane thought Ivermectin was actually a cure for COVID, if they did, it would make billions. Even MAGGots who preached Ivermectin didn't take it on their death beds because it doesn't work.
And papers you posted said COVID caused heart problems and now you are saying it doesn't. Do you read your own shit or not?
In fairness, it was one of the few meds that showed in-vitro promise when scientists were throwing everything at the virus at the onset of the pandemic. It remained an authorized 'trial' med by the NIH since it's fairly harmless, but no, it has not panned out.