I see a lot of people use blood effects so i searched up how to turn on blood effects and apparently its in the settings but nothing shows up for me just the normal settings no show blood option is it because i play in australia?

after playing for a while, im not sure if the only way to play is stealth mode or if there's some kind of agent ability that will help me in my always-pushing-in style. Can somebody lmk if there's anything that'll support my playstyle or is...