I’ve been messing around with the MR60FDA1 60GHz mmWave detector in esphome and Home Assistant. Unfortunately it has the same 6m range and 60° field of view you’re looking to get around.
I will say, though, that within range the sensor is quite responsive, and detects static presents quite well. The high frequency gives it sufficient resolution to detect micro movements like fidgeting, looking around or even breathing. My module has fall detection on board, purportedly to sense if a detected person is standing or laying down. Another version supposedly can detect respiration and heartbeet within a couple of meters.
The good thing about 60Ghz is they tend not to interfere with each other, so several units could be arranged with overlapping fields of view.
I’m pairing mine with a PIR module for rapid detection, and to help eliminate false positives on radar hits since radar can see through walls, and doesn’t necessarily expose the distance to the target in esphome.
The 24GHz models have a longer range up to 12m and may have 360° fields of view, but have lower resolution and ranging for micro motions. In the US, they are being phased out for potential interference with aviation though I can’t speak for other countries.
Andreas Speiss posted a good video on YouTube that covered a bunch of different models (link below) that I thought was informative. It will.lead you to some other similar content that might help you to assess your needs and match a product to your application.