Having started my technical career long ago as an angsty teen looking to develop cheats, I'm aware of the architectural issues. This is probably a hot take, but

Having started my technical career long ago as an angsty teen looking to develop cheats, I'm aware of the architectural issues. This is probably a hot take, but for FPS and the like, I view wallhack-type cheats as fully inevitable, and more of a game design challenge than a technical one. Compared to old school FPS like COD and CSGO, I'll throw out Overwatch as a good example of a game that de-emphasizes the relative importance of knowing an enemy's position by dramatically raising TTK and placing importance on team coordination, mechanics, and character selection. A cheating sniper in OW can easily get shut down by the coordinated actions of two enemy tank players. Designing the game in a way that limits the ability of a single wall-hacking sniper to ruin the experience is IMO much more effective than getting into a kernel-level AC arms race. Valorant still has cheats available for it, after all.