Edit: this question has been answered now. Thank you to everyone who took the time to help me understand.
the premise that race is not a natural, biologically grounded feature of physically distinct subgroups of human beings but a socially constructed (culturally invented) category that is used to oppress and exploit people of colour.
Okay… But we can take a DNA test and get our ancestry, telling us what percentage of what races make up our overall ethnicity. So how is race a social construct and not a biological feature, when we have a scientific method to determine our race? This part of the philosophy has been bothering me ever since I read it, and I’ve been hesitant to ask because of how offensive people get when you question this system.
Your question has nothing to do with CRT, but with science (I am very critical to CRT if you want to know).
There is a scientific method to classify human beings by genetics. You can group by closeness of genetic code. When you do this you will arrive something similar to ethnicity NOT to race. Race classification is akin classification by eye color, while has some relationship to genetics - it has very little relationship and the genetic code similarities between two of ethnic groups, one has white skin, another have black skin, may be significantly larger than genetics similarity between two groups with black skin. This is why it is unscientific classification.