Simulating by ModelSIM signals multiple blocks nested inside each other on quartus||

So, in the attached project there is a file containing two megafunction blocks, an LPM_Counter and an LPM_Compare, called "Portante_u_v_w". After connecting the various inputs and outputs to them, I created a new file called "Main" from this "Schematic" file. In the "Main" file there are the same inputs and outputs present in the schematic containing the two megafunction objects described above.
The problem now is that: both with the "Main" file open, and with the "Portante_u_v_w" file, I launch the RTL SImulation simulation, ModelSIm opens, but in the work folder I can only add and display the inputs and outputs of the LPM_Counter and LPM_Compare megafunction objects, but not the external signals. So for example, looking at the input and output signals shown in the "Main" file, I can't add the waves in the ModelSIm environment, but only the signals of the individual megafunction objects. I hope it's clear now what I want to solve.
Again, I repeat my request: with the "Main" file open, I want to be able to simulate and add waves in the ModelSim environment the signals that appear in the "Main" file, that is:
- clk
- clk_en
- cnt_en
- as_res
- spi
- out

I hope now is clear and i hope to reach my goal.