any of the first 32 controls can be optionally paired with a control offset 32 higher to give 14-bit control.
NRPN is an extension of that, where controller 99 - NRPN Most Significant Byte (MSB) - followed by 98 - NRPN Least Significant Byte (LSB) sent as a pair specify the parameter to be changed.
Instead of using NRPN, I use the “relative” mode of the BeatStep Pro - It has 3 different modes - I don’t remember which one I used in the VCV module by Stoermelder.
I don’t have a patch handy, but here’s one I posted earlier for the Ableton Push2, that shows the use of MIDI-STEP with PILE to control CV’s
EDIT:
Some DIY 14-bit midi controller links