Hi Bassam,
I understand that you are trying to find the name of the block that you have provided in the image.
The block that you have provided seems to be a sub-system or the reference model. I can provide more details of the block if you can share the model.
In general, to find the name of the block in Simulink, double-click on the block. Then a pop-up appears on the screen which contains the information about the name and functionality of the block.
I hope this answer will be helpful.
