I haven't used zigbee, I am used to Z-wave, but apparently they are very similar. In which case, you would simply use the on/off command to switch it.
The config file is
#Z2Tv1
# GiEX garden watering https://www.aliexpress.com/item/1005004222098040.html
:TS0601,_TZE200_sh1btabb
EF00/0101,WaterMode # duration=0 / capacity=1
EF00/0102,WaterState # off=0 / on=1
EF00/0365,IrrigationStartTime # (string) ex: "08:12:26"
EF00/0366,IrrigationStopTime # (string) ex: "08:13:36"
EF00/0267,CycleIrrigationNumTimes # number of cycle irrigation times, set to 0 for single cycle
EF00/0268,IrrigationTarget # duration in minutes or capacity in Liters (depending on mode)
EF00/0269,CycleIrrigationInterval # cycle irrigation interval (minutes, max 1440)
EF00/026A,CurrentTemperature # (value ignored because isn't a valid temperature reading. Misdocumented and usage unclear)
EF00/026C=0001/0021,mul:2 # match to BatteryPercentage
EF00/026F,WaterConsumed # water consumed (Liters)
EF00/0372,LastIrrigationDuration # (string) Ex: "00:01:10,0"
So, clearly the command is on/off. When you interrogate it, it should respond with all the variables in the file. If you are doing it directly, it should be a json packet.