You're assuming a difference between the U.S. and Europe that's not there. Looking at the 2018 PISA scores, for example, U.S. 15-year-olds do fine in reading: https://nces.ed.gov/surveys/pisa/pisa2018/pdf/PISA2018_compi.... Slightly ahead of Norway, Germany, Denmark, and New Zealand.

The U.S. does much worse in math, but I don't know why any of the explanations being discussed here (parental involvement, etc.) would result in good reading scores but bad math scores.