Conversion of SIMULINK models to code for F28379D

I am trying to implement a single-phase PLL using the F28379D microcontroller. The PLL is working fine in the simulation but not working after uploading the code to the F28379D MCU.

I think The PI controllers I used were in Laplace transform, so the MCU doesn't support it.

I tried using discrete delay for the input sinewave, and that was working fine, so I concluded that the discrete filter is working with the F28379D.

There is a continuous and discrete PLL block available in the SIMSCAPE; both are working fine in the simulation but not with the F28379D. I think we can only convert SIMULINK blocks into the code.

Kindly suggest to me what I should do to implement single-phase PLL using F28379D? I have less knowledge about what are blocks we can use and what we cannot.