For demonstration purposes, here’s a tutorial for Photoshop that seems related to this feature request:
https://digital-photography-school.com/how-to-use-lab-color-in-photoshop-to-add-punch-to-your-images/ (@Mike_Murphy_1948, if this isn’t what you are talking about, please explain.)
Currently, PhotoLab works internally within the AdobeRGB color space. (See here and here for reference.) However, you might want to read here and additional discussion here. Maybe there are plans to add Lab as a working color space?