They do work once the anticheat is patched to nullify the latest batch of cheats that were developed to circumvent it.

What you’re noticing is the time interval in between the cheats being updated and the anticheat being updated. That is an unavoidable and non-stop chess game between developers. There will always be a new set of cheats which work temporarily because of how much financial incentive there is to develop them. Cheaters pay thousands of dollars for these things.

If cheats are operating at the kernel level, then anticheat must also if it expects to be capable of detecting said kernel level cheats.