What's your source for the 2022 difference?

PISA itself doesn't publish data broken down by racial subgroup. Back in 2018, the NCES public download included a RACETHC variable (https://nces.ed.gov/pubs2021/data/2021019_rawdata.zip).

But the most recent file on the NCES PISA 'data products' page is from 2018: https://nces.ed.gov/surveys/pisa/publications.asp

(At the time of writing if you expand 'Data Products' the first file is 'Program for the International Student Assessment (PISA) 2018 Public Use File (PUF) NCES Number: 2021019 Release Date: July 8, 2021')