Device information:

• Name(s) of the device: Xiaomi Purifier 4 Compact

• Link: https://www.mi.com/global/product/xiaomi-smart-air-purifier-4-compact/

• Model: zhimi.airp.cpa4

• Hardware version: esp32

• Firmware version: 2.2.1

Additional context
'on/off/set_mode/set_led_brightness(reversed)' works with _MAPPING_VA2
'set_fan_level/favorite_level/favorite_rpm' didn't work with any that i tried
'status' doesn't work with any - when sending status command, the device beeps > wifi icon flashes several times > Error: Unable to discover the device 192.168.x.x

also this model has 'PM2.5 IR sensor' not laser like other ones, and does not provide exact pm2.5 value even in the official app

https://home.miot-spec.com/spec?type=urn%3Amiot-spec-v2%3Adevice%3Aair-purifier%3A0000A007%3Azhimi-cpa4%3A1

tested and working:
read pm2 value - get_property_by 3 4
set favorite level - raw_command set_properties '[{"value":1,"siid":9,"piid":11}]'