from pymodbus.mei_message import ReadDeviceInformationResponse                
print(f"Reading device info from slave {slave_id}")
response = client.read_device_information(unit=slave_id)

if isinstance(response, ReadDeviceInformationResponse):
    for object_id, value in response.information.items():
        print(f"{object_id} : {value}")
else:
    print(f"Error: could not read device identification for slave {slave_id}")

It gives this error when I run in pymodbus 3.2.2:

Error: could not read device identification for slave 1. 

When I try running in pymodbus 3.2.0 I can get the device information:

Reading device info from slave 1
0 : b'pymodbus'
1 : b'PM'
2 : b'3.1.0'