Epic fight server configuration 1.16.5

Hi there! so a couple of friends decided to start a new 1.16.5 sever, everything is running fine, but we are trying to get epic fight skills not to be Lost upon death, on SP version when creating the world I can activate the option, buy I would like to how to activate the option for MP in aternos, or if possible to activate the option on an already created world

Any help would be greatly appreciated

Will that be located on the server confing, in aternos right?

Edit: Thank you! I managed to find it