Please tell me, what should the ECU data flow and EGR be like?

Does this mean the EGR valve is stuck?

Idle, maintenance mode, let the water temperature rise, the cooling fan starts running, and the EGR data does not change

 

What is your normal data?

 

EGR Valve Position/Duty Cycle:
At idle and low load: The EGR valve is normally partially open, allowing a small amount of exhaust gas to recirculate into the intake manifold to lower combustion temperatures and reduce the production of nitrogen oxides (NOx). You may see a non-zero percentage or a value indicating that the valve is partially open.
At high load and acceleration: The EGR valve is normally closed. At this time, as much fresh air as possible needs to enter the engine for maximum power output. You may see a duty cycle close to 0% or a value indicating that the valve is closed.
When cruising: The EGR valve may open moderately depending on engine load and speed.
When accelerating hard or at full throttle: The EGR valve should be fully closed.

For the 2014 Toyota Prius, here are a few things to keep in mind:
The hybrid system in the Prius may have a specific control strategy for the operation of the EGR system.
Carbon deposits are a common problem in the Prius EGR system, especially at higher mileage. Carbon deposits can cause the EGR valve to stick or the EGR passage to become clogged, which can cause EGR_ERR related fault codes.
When you see EGR_ERR, it usually means that a diagnostic is needed to determine the specific cause of the problem. Diagnostics may include:
Reading Trouble Codes (DTCs): An OBD-II scanner can provide more specific fault codes to help narrow down the problem.


Common EGR related fault codes include

P0401 (not enough EGR flow),
P0402 (too much EGR flow),
P0403 (EGR circuit fault), etc.

Check the EGR valve: Check if the valve is sticking and if it can move smoothly.
Check the EGR passage: Check if there is any blockage due to carbon deposits.

 

I only have a small OBD device.

 

This is what I found on Google. I don't know what the value should be, so I'm posting this to ask for advice.

 

EGR_ERR: This data is the difference between the expected EGR and the actual EGR