If we're talking exclusively this data set, it's all available online at https://www.nationsreportcard.gov
In short, there's zero evidence that schools that were closed longer have had greater declines than schools that were closed for less time. Forbes, actually, did a good piece on that when the 2022 data set came out at https://www.forbes.com/sites/petergreene/2022/09/24/did-closing-school-buildings-cause-test-scores-to-drop-looking-for-evidence/?sh=20f6d77a24c4
For whatever it's worth, the local public schools where we live were fully closed for exactly 3 weeks in 2020, after they had already finished state testing, during which time they would have largely been watching movies and whatnot in class, and everyone's raging about how that ruined the kids forever. It's obviously, absurd that essentially adding 3 weeks onto their summer vacation damaged them forever, but, the unfortunate reality is that no amount of data will ever make most people believe differently, so it's kind of pointless at this point in time.
