I know of AerynOS and Chimera Linux but AerynOS still in alpha and have suffered a few issues with Kwin and I am just not technical or dedicated enough to setup something like Chimera Linux.
I know some might say this is a losing battle and you can never 100% sure of something did not use AI but I try my best to find things that promise no AI, plus, I want to support some of them monetarily so they continue getting developed.
Maybe also being into gaming does not help my case T-T
With the current state of things, if a software distribution includes Linux, it includes AI assisted code. Maybe something like NetBSD? I’m not even sure if anything is AI free anymore.