How to control FX options in PlayStation5 platform?

i control fx quality using ‘sg.EffectQuality’ console variable. In PC, fx spawn rate is controlled well but in ps5, if ‘sg.EffectQuality’ is less than 3, all fx turned off.
Anybody knows how to controll fx quality in ps5? or is it not possible because of UE5’s(or PS5’s) optimization?