Valorant and Battlefield 6 does require secure boot and they do not sell their cheat for those games. Though there are still cheats available for those games, in particular using DMA hardware.

You connect the DMA PCIe card to a laptop/pc with USB, then it can read any memory on the game PC and display a radar on the laptop screen. They even sell mouse and hdmi/dp mergers, these allow the laptop to show an ESP overlay over your game and aimbotting by sending mouse inputs.