Bullshit:
"Opposition to what was purported to be critical race theory has been adopted as a major theme by several conservative think tanks and pressure groups, including The Heritage Foundation, the Idaho Freedom Foundation, the American Legislative Exchange Council (ALEC), and organizations funded by the Koch brothers. [...] In 2021 [Christopher Rufo] wrote on Twitter, 'The goal is to have the public read something crazy in the newspaper and immediately think 'critical race theory'' and 'We have decodified the term and will recodify it to annex the entire range of cultural constructions that are unpopular with Americans.'"
"The Economist and Reuters have conducted polls on how much the general public understands CRT, a 'once-obscure academic concept', and they found that most people are unfamiliar with CRT and misunderstand it."
(From https://en.wikipedia.org/wiki/2020s_controversies_around_cri....)
It is absolutely a conservative boogeyman and (for the most part) has never been a taught subject outside of college.