https://wccftech.com/some-asus-z690-b660-motherboards-will-not-be-compatible-with-noctuas-lga-1700-alder-lake-cpu-coolers/

Noctua was one of the first big cooling manufacturers to announce their LGA 1700 'Alder Lake' CPU mounting kits for their cooling lineup. The manufacturer recently released the compatibility list for its cooling lineup and it looks like all major motherboard manufacturers are ready except ASUS.

ASUS and Noctua have been collaborating together for a long time, starting with their ROG AIO coolers and the more recent GeForce RTX 30 series graphics cards. However, it looks like ASUS didn't work with Noctua this time around in making sure that their coolers were compatible with the brand new Z690 motherboards.