CRT is a fake controversy the Right has bastardized to mean anything that makes them feel uncomfortable. Thank goodness for MAGA patriots like Kristi Noem, who will stamp it out in South Dakota, where no one even knows what it means.
You're absolutely right, the CRT curriculum specific to academic legal theory in higher education isn't being taught in K-12 but components of CRT certainly are. Much like "assault weapons", the devil is in the definition of CRT. The claim from the left is that things like equity and anti-bias aren't tenets of higher ed CRT so what's finding it's way into K-12 can't be defined as CRT.........smoke and mirrors.
Here is a good example of a VA dept of ed website with all of the talk tracks:
Here is a list of what's banned by state on the NAACP's website. You'll note that teaching history specific to slavery, racism etc isn't listed as things that are banned but teaching unproven, theoretical constructs around things like white privilege are banned and as they should be.