Indeed - all the graphs in that link show lower test scores for longer "in school cpu use". But the longitudinal comparison (2012-2018) show almost no change (except for zero CPU use, which they didn't really explain.)
I don't know how much stock should be put in these numbers. Here in Atlanta there was widespread cheating organized by teachers and principals to game the results.
With NCLB test scores became very important. With Every Child Succeeds they became less so. The difference could simply be how much incentive is there to game the scores.
This link shows the longitudinal drop in 2022 for the US - almost assuredly pandemic related https://nces.ed.gov/fastfacts/display.asp?id=38. Otherwise the scores are higher than ever.