How to change corpse decay?

Hey everyone

I have been trying too find a longer corpse decay mod… but all are outdated… like the persistent corpse is also outdated and have glitches like flickering certain units & stable building… the other mod is Visible Corpses “non data” but its only 5 minutes. i prefer like 20-30 minutes as i play mostly offline. i did some searching and someone wrote : in scenario editor with the trigger ‘Modify resource’ and then selecting change decay corpse time, you can achieve what youre asking i tried that but its not working at all… corpse still disappear after 20-30 second…

so anyone can help me how too make my own longer decay mod… thank you

kind regards