Kg/min means I still have to convert every figure to kg/h in line with Vida. No matter.
The IAT should be increasing as temperatures in the engine bay increase.
Out on a sustained speed run on a warm day like today, IAT should be within around 6°C of outside temperature.
When the car is warmed up and slowly driving or stationary, heat soak will raise the IAT to higher than ambient, maybe an additional 20°C when stationary.
At idle, your MAF should be around 25 kg/h (EGR open) then after around 2 minutes of idling MAF should increase to around 50kg/h so a noticeable step change in line with a correctly functioning EGR valve closing.
Underneath the car, you should also be able to physically see the VNT actuator moving when revving the engine as shown
in this video.
The VNT actuator can be vacuum tested as shown
in this video.
Until you can methodically check and confirm everything, you could have a combination of a general vacuum leak, malfunctioning VNT actuator, sticking VNT vanes, malfunctioning EGR, failing IAT sensor.
I think your problem will lie within these.