Pythonista's extended keyboard doesn't respect the key click settings (possibly there is no public API for reading that setting - @omz?). It does respect the silent/mute switch, though that will of course also turn off all other "sound effect" type sounds and switches the ringer to vibration only, which might not be what you want.
Welcome!
This is the community forum for my apps Pythonista and Editorial.
For individual support questions, you can also send an email. If you have a very short question or just want to say hello — I'm @olemoritz on Twitter.