@PV3679 I solved it on my end by doing 2 steps.
Renaming the Faust modules parameters to something less generic (So FXslot1_Cutoff instead of simply 'cutoff'. It is my understanding that Faust modules dont like names that are re-used.
I compiled ONLY the Faust module (so got rid of other stuff and compiled).
After that the knobs of the Faust module were working 🤷🏻♂