As for South Korea, "whiteness" still plays a big role eg "looking white" [2].
Japan is essentially a monoculture. You're not Japanese if you're not ethnically japanese. How is that not "white supremacy" in a different form?
China is similar with the supremacy of the Han Chinese [3].
The Middle East very much has racial supremacy. Look at how all the imported workers aret reated from the Phillipines and India. Or the treatment of the Kurds. In Saudi Arabia, Arabs sit at the top. In Iran, it's ethnic Persians.
And this is before we even get started on Israel and Ashkenazi Jews, Sephardic Jews, Mizrahi Jews, Ethiopian Jews and of course ethnic Arabs (Palestinians including Israeli Arabs).
As one example from Africa, look at Kenya [4].
[1]: https://www.npr.org/2013/09/19/224152635/skin-color-still-pl...
[2]: https://humsci.stanford.edu/feature/stanford-scholar-traces-...
[3]: https://www.theatlantic.com/technology/archive/2009/07/on-ui...
[4]: https://www.cnn.com/2023/03/15/middleeast/tunisia-president-...