Prevent Mac from sleeping when lid closed on Mojave / Catalina

So I saw a lots of old discussion on this topic, but I'm trying to find out an actual solution that still works on Mojave / Catalina, **without the use of external monitor/keyboard/mouse/with power adapter**. When looking up Amphetamine, they claimed that you can only do it when the 4 criteria are met, and cannot overridden it. But on the other hands, Anti Sleep provide the feature in their pro version... So, which one gets the real deal ? Is Anti Sleep lying about it or Amphetamine (and all other caffeine app on the appStore) is out of date ? I also heard about InsomniaX and built-in caffeine but it's really not user friendly, and appear not to be supported anymore...