Well I guess it depends on how many people of a certain ethnicity apply for tech jobs or have the qualifications necessary. It seems to me that there are many variables at play here.
Ideally companies should screen mainly based on skill. This is why coding interviews exist. Tests can even be administered online through platforms like TestDome for a pre-interview filtering process: https://www.testdome.com/
This way is skill first, which is of course more thoroughly evaluated in the technical interview.