Specifically, by August 16:
AMERICA COUNTS STAFF
JULY 12, 2021
The U.S. Census Bureau by August 16 is set to release in-depth demographic statistics from the 2020 Census that will be used to redraw legislative voting districts.
These follow the April 26 release of the first results from the 2020 Census, which showed that the total population was 331.4 million. The first release determined each state’s share of the 435 seats in the U.S. House of Representatives.
The August release will be in a “legacy” format that governments used in the 2010 and 2000 Censuses. States will use these files to begin their redistricting efforts.
By September 30, the Census Bureau will make the same data available online in a more user-friendly format on data.census.gov.
https://www.census.gov/library/stories/2021/07/upcoming-release-of-2020-census-redistricting-data-paint-clearer-portrait-of-america.html