Have you looked at the PISA data DAR.
"Singapore, Japan, the United Kingdom, and Canada were among a handful of countries that scored better than average on all four tests.
In the U.S., reading scores fell, but math and science results were essentially flat between 2022 and 2025. Seventy-four percent of American 15-year-olds reached basic proficiency in reading, compared to 69% among 38 relatively affluent countries that are part of the OECD. In math, U.S. proficiency was 65%, the same as the OECD average.
I started a thread on how well the UK and especially England are doing, but it didn't get a lot of response!