Linking/parenting effects together

Using the Parent/Link column, you can expose the properties you want to link in the timeline and drag a pickwhip from one to another. You will have to do that for every property that you edit.

This will only work if every shot in the timeline requires exactly the same color correction settings. That will only work if the shots have exactly the same lighting and exposure. High-quality color correction often requires more than one copy of Lumetri, some masks, and a lot of fine-tuning, some of that with keyframes. 

If all you are doing is applying a Lut to get the shots close, dragging the pickwhip from the bottom layers Lumetry/Properties to the master might work for you.