Here's a few excerpts from an article [1] on the subject of Nigerians immigrants to the USA outperforming nearly all other groups - and yes, they outperform native-born Caucasians:
Education is an essential part of our culture ... we were encouraged to excel. Parents expected it of us ...
Sometimes that is why Nigerians in diaspora — especially the first generation — can be reluctant to talk about race and racial barriers, because we are conditioned to not say, ‘It is not going to work for me because . . . ’. They don’t want to talk about racial bias. They want to talk about the opportunities...
By not looking for "racism" but taking their lot in their own hands this group of people ended up as one of the most successful [2] ethnic groups in the USA. Had the narrative around "systemic racism" been true this would not be the case, i.e. the narrative is false. It is not just false but it is pernicious in that it leads to exactly the lack of success which these studies claim to want to solve.
[1] https://africans-in-america.com/2020/10/30/what-makes-nigeri...
[2] https://africacheck.org/fact-checks/spotchecks/yes-nigerian-...