Color Sampler Overlay Lightroom Classic Photoshop Raw

Hi everyone! Is there any option to sample 3 colors at the same time in Lightroom Classic?
I use Photoshop Camera RAW (PR) to correct color values on my photos. Part of my workflow is to open the photo in PR and use the Toggle Sampler Overlay (S shortcut) that you can find in the bottom right corner to pick three of the gray values on the X-Rite Color Checker there is in my photo. I picked white, mid-gray, and black. Then, when I make changes to my photo I can see those 3 values moving on the fly.
I save the DNG file with my changes, then import it in Lightroom and sync the changes with the rest of the photos.
I'd like to skip PR and just do all that inside Lightroom Classic, but I can't find the same tool there... any ideas? 

Thanks a lot!!!