Tia Portal - S7 1200 OPC UA -> NODE RED

Good morning to all!
Im developing a program to a machine to read a sensor of each part made of to count the number of parts by reference.
But at this time i have the program on the plc working, in UA Expert i can see the db variable, but on node Red in can´t see the value on the db, the debug gives me the "24/11/2025, 1:52:54node: debug 1 msg.payload : undefined .undefined
On the OPC UA item node i have ->Item ns=4;i=2
Type int32.
Even on the dashboard don´t apper the number on the db.
Can anyone help me? Thanks in advance