The modeling of this control is quite similar to the Mustang Cockspur where the range control does work as intended. I have the latest version of the PH100 available in the Marketplace of MSFS2020. I reported this in the master Cockspur section located here, but was unsure that was the appropriate location for assistance. I haven’t found any other mention of this yet but in viewing some of the youtube videos and there was no adjustment of this setting within the video. I deleted the plane inside of the Marketplace restarted MSFS2020 then reinstalled it again also inside of the Marketplace then restarted MSFS2020 again but upon starting the place from a cold dark cockpit as recommended by Cockspur, the range setting in the MFD was still set to 100 miles and not adjustable. Any recommendations on a fix or wait for Cockspur to fix it? I do not use SimBrief or navigraph subscription which this plane seemlessly interfaces for routing so the range function is more critical in monitoring the approach especially for RNAV approaches.
Thanks