Hello Aternos team,
I would like to use the mod "Apathetic Mobs" created by user whizzball
It has a recent version on Curseforge (1.15 this year).
https://www.curseforge.com/minecraft/mc-mods/apathetic-mobs
With Apathetic Mobs players can enable monster spawns without worry of being attacked, while still enjoying looting mob specific drops. There's an option for monsters to retaliate when attacked and a whitelist option to allow only specific players to be unharmed on a server.
Thank you very much!