Good to see proliferation of presence detectors. Good for turning things off when nobody is around.
In my last job I got to play a bit with the SeeedStudio mmWave presence box. What was interesting (and a little confusing) was that it took multiple add-on boards for things like on-device fall detection (for elderly). For the time I had with it, it worked fine with HA: https://wiki.seeedstudio.com/mmwave_radar_Intro/
Yeah that seems to be why the EPL supports a bunch of sensors, it's a tradeoff between different features for each sensor. Some do X/Y position tracking (default one). Some do fall detection. Some can measure heart rate. But seems like no sensor can do it all, at least not in that price range.