> IQ may not be real but IQ tests are and black expressing genotypes
"Black expressing genotypes" is the kind of phrase you'd expect someone to come up with if they wanted to mean "phenotype" but had a political motive for wanting something that sounded like "gene" to be in it.
> reliably score lower on them on average.
No, they don't. In the US there has been a significant—but inconsistent over time, racial IQ gap—but both the variability over time in that gap and all the studies that explore more details besides just broad racial contours show that that gap is at least largely and likely entirely due to socioeconomic, cultural, and environmental factors correlated with race, and not genetic.