Is there a way to check mod logs

Mod logs..? You mean the output of what the operator does? You can use the console panel or the logs panel. Normally you can also view what a operator does (if you have operator) through the chat if you're ingame, if you're not then you can still view it from console/logs.

https://aternos.org/log/
https://aternos.org/console/

Also, make sure this option is enabled. (https://aternos.org/files/world/level.dat)