Dominick Reyes is generally described as Mexican-American, with origins traced to California, and he has spoken about his Mexican heritage as a meaningful part of his identity. He has also discussed his Christian faith in interviews.[1][2]
Important note: I can share what reputable sources report about his ethnicity and background, but conversations about an individual's ethnicity can be sensitive and deserve careful context. If you’d like, I can summarize consensus from multiple outlets, or pull direct quotes and dates from specific articles for accuracy.