As explained in the parallel thread, if you want to change L while keeping a and b, you’ll have to use a module that works in Lab. Afaik, none of the “scene-referred” modules work in Lab. Otoh, many of the “scene-referred” modules have been designed to minimise unwanted hue and chroma changes.
You may want to read up on the introduction of filmic to see why Lab was dropped. In short: Lab isn’t designed for the dynamic ranges of modern cameras, and using it outside its domain of validity causes issues/artifacts.
(Lab is designed to describe the colour of diffuse surfaces under a standard light source, where you cannot get L values outside the range 0…1, or 0%…100%).