MR60BHA1 static vs movement

hi all!
Im considering to buy a Human Static Sleep Breathing Monitoring 60GHz mmWave Sensor - (MR60BHA1)
I would like to know your opinions on the use of this sensor in cases where the user is moving, not just lying down or sitting. According to the name ‘static’ it tells me that it doesn’t work while the user is moving… but I’m the only radar sensor option I’ve found on the market.
The MR60BHA2 is out of stock, right?
I would love to get one of those Getting started with MR60BHA2 | Seeed Studio Wiki

Thanks in advance for the help!