Incorrect, League of Legends and Valorant both use Riot’s proprietary Vanguard Anticheat. The reason it has to run on startup and won’t work if started afterwards is because it’s a kernel level program.

EAC does also have kernel level capabilities, and in fact conflicts when run at the same time as Vanguard, but your list is incorrect.

Runescape (both RS3 and OSRS) do not use EAC and cannot tell what programs you have open.

While too many games use Kernel Level anticheats, it isn’t normal or industry standard by any stretch of the imagination and it also doesn’t actually work very well compared to other methods so not only does it not protect you but it makes you more vulnerable.