That report doesn't give any evidence of COVID denial. It's just graphs of how often COVID relate content is reported/flagged.
If you look at the paper the article cites as evidence COVID denial exists, it's actually also not true. They ask people variants of "do you think the danger of COVID was exaggerated" and when people say yes, they get classed as people who think COVID is a hoax. So the claim that people think COVID is a hoax, is a hoax. This is what "science" has become.