Sure. Of all the ways that have been proposed for countering disinformation, fact-checking is probably the one that's been most studied. There are very many studies of fact-checking initiatives, and the general finding is that they do work to an extent. They particularly work on correcting factual beliefs. That corrective effect is not necessarily enduring over time, and it does not necessarily change the attitudes or the behaviours that then result from that belief. For example, you might learn that a certain policy is based on a factual error, but you might still continue to support that policy.
There are hundreds of fact-checking initiatives worldwide that are to be commended and supported. In many countries, fact-checking itself has become the source of partisan controversy. I think fact-checking is promising and should be continued. I also worry that its effectiveness could be degraded over time as it's the victim of partisan mudslinging.