I don’t doubt that there’s some demographic shift happening.

The city/metro is still about ~24%-28% Black. If you’re using data that shows something significantly different, sharing it might be helpful.

Demographics are shifting, although the biggest chunk of population growth is among Hispanic/Latino residents.

https://www.dallasnews.com/news/politics/2021/08/12/north-texas-population-boom-continues-hispanics-outnumber-whites-in-dallas-census-data-show/

Kaufman County led the Dallas-Fort Worth metropolitan area with a 40% population increase, followed by Rockwall with a 38% gain. Both counties have a white population that exceeds 60% of the total.

As expected, Dallas and Tarrant counties saw some of the slowest rates of growth in the metropolitan region, with 10% and 17% increases respectively, according to the census numbers.

…

Also, as professionals age and establish families, they continue moving out of cities and into the surrounding areas/suburbs.