Can we measure Lab values or RGB values (or any values at all?!?) in Lightroom Mobile for iPad?

Is there any way to measure Lab values or RGB values (or any values at all?!?) in Lightroom Mobile for iPad? There seems to be no color sampler tool for doing that. Is there some other way, or workaround, or trick, that I haven't yet thought of? I do nearly all my raw processing in Camera Raw for MacOS, and I rely heavily on the color sampler tool in that app in order to, for example, measure the Lab values of ColorChecker patches, gray cards, seamless backdrop paper, etcetera. It's so fundamental to any workflow requiring objective values that I'm astonished to learn that it seems absent from Lightroom Mobile for iPad. Thanks, Mark