I disagree, a trim function for nosewheel steering is not ESSENTIAL l, have never used it on any jet. That said, the Core offers plenty of opportunity to do an initial setup of NS tracking using an assigned trim, lever or side pushbuttons, then set the value of offset into the function assigned for the NS and then leave it. Job done.

If you need constant adjustment then you have a more fundamental problem.

Rudder trim CAN be very useful for any jet showing slight roll out of trim which is different inverted or upright. After checking weight balance, a small RUDDER adjustment can often effect a cure.

Even Boeing recommends using (upright!) a small amount of rudder to correct slight roll trims to centralise the control wheel. As well as avoiding spoiler uplift it , apparently, is more efficient, or so they told me !