Hello, is there a way to get pressure sensitivity for the fade/hardness brush setting?

'Fade' seems to be used as a control parameter or control input (over distance) for various brush preset characteristics. As such, you can't use stylus pressure to control the fade. You can use fade (over distance) to control most brush preset characteristics.

You could try editing the brush preset settings and do something like pressure controls the opacity and/or size within certain limits, as defined by the line on the transfer graph. It all depends on the effect you're trying to achieve. I suggest that you play with them all to see what they can do.