@gumuroo Difficult to really say what it might be, then. On my 2017 MBP running Catalina TS4 causes the fans to spin (though at what I'd call "medium" level) and the CPU average to run at ~140% when in-game (as opposed to sitting at the main menu, etc).
There are third party utilities you can get that show you the sensor readings of how hot your CPU and GPU are, and what the RPM of the fans are. Those data can help you to better judge if things are running too hot, or if the computer is just leaning into a heavy workload but is not being stressed by it.
Keep an eye on things. Let me know if it seems to be getting worse.
