“ 2020 census count of every person living in the United States,”
Nope. Supposed to be all citizens of the US.
Nope to you. It's supposed to be "the whole number of persons in each state" (U.S. Const., Amend XIV, sec. 2). The Fourteenth Amendment uses the word "citizens" lots of times, but not when it's saying who gets counted for apportionment.