I have started working on a solution. The first attempt failed, but I have new ideas now
Currently, this driver supports more than 150 (one hundred and fifty!) different unique manufacturer/model mmWave devices, grouped in 27 (twenty-seven) groups ("deviceProfiles"). The inbuilt JSON configuration data in this driver has reached the maximum allowed 64K of static data in Hubitat, which is why new mmWave radars cannot be added anymore.
The next attempt will be to move the JSON configuration as a file stored locally on the Hubitat File Storage.
As announced earlier, the size of the "Tuya Multi-Sensor 4 In 1" driver became too large, and it is impossible to add new devices to it. All the mmWave sensors support will be moved to this new 'Tuya Zigbee mmWave Sensor' driver.
If your Tuya (or other brand) mmWave 'presence' sensor works OK with the 4-in-1 driver you are using, there is no need to move to this driver now.
However, any improvements and new models will be added to this new driver only. When the new driver is confirmed to be working OK for everyone, the old 4-in-1 code will be stripped down to support only the basic 'motion active' / 'motion inactive' events, without any extra features. I have to do this to free up code space for adding new Tuya PIR motion sensors models into the old driver. If someone accidentally updates the old 4-in-1 driver to the basic functionality only new versions, there will be a warning and link to instructions on transitioning to the new mmWave sensors driver (this one).
The work on the transition is still in progress, but the basic functionality is working, hence the [BETA] tag. However, it will be better to discuss the new driver in a new thread (although there is still some planned work) rather than in the old thread to avoid confusion.
Please use the community Hubitat Package Manager (HPM) to install the new driver - search for 'Tuya Zigbee mmWave Sensor'.
The latest development branch version which contains the newly added devices and bug fixes can be updated manually from this link :
You can use this procedure for a quick manual update of the driver.
For any issues or questions on this new driver - please comment here.