I bought a new bike a few months ago with the Rohloff 14 speed hub. It uses the shifter supplied by Rohloff, a twist shifter. See photo below.
While that does the job I really would have preferred thumb shifters, one of the left side of the handle bar (to go to a lower gear) and one on the right side of the handle bar (to go to a higher gear).
I was unaware of this but these thumb shifters exist though not supplied via Rohloff. This item is a tad pricey and I might wind up ordering it.
The company that makes this is cinq5.
Just passin' this on ...
Click on photos to enlarge.