The game was released a few months ago (28 October 2021), and while it would be common place to include DRM like Denuvo at launch, its not unusual for many developers to removed once the launch window has passed (there are examples of this happening). I find it odd that it would be added now, 3 months after launch. Not saying you are wrong, just that I find it strange.
I'll wait for ESET to address the issue with an update. I'm sure it won't be long.