I was experiencing very low volumes recording DI on Input 1 whereas the processed signal Input 3+4 was good.
I could not find any proper solution listed but finally found a solution. Posting here in case anyone needs it.
After connecting Nano to computer before opening your DAW (Logic) go to System Settings… navigate to Sound. Look for the Output & Input and Click on Input - Nano Cortex - Increase the Input Volume.
This looks much better.