Houston, we have a problem
Here are provided tips to help you find out why DRM effect is not visible or working:
Just for test, use the resultant mask value of the DRM node (or method) inside shader for the Base Color only without any other effects involved. This will help to visualize where on a mesh is rendered mask and how its visual properties affect it.
Make sure DRM Controller updates required material(s) and its DRM Settings are exactly the same as the DRM node (or method) settings inside shader.
If shader uses several different DRM nodes (or methods), for updating each one use a separate DRM Controller.
Make sure DRM Controller Pool contains mask objects. DRM Game Objects can be checked directly in the scene and number of run-time generated DRM Live Objects is visible inside the Inspector:

Enable Draw Gizmos checkbox to visualize mask objects position and their radius in the scene:

Make sure Gizmos is enabled for the scene view too:

Check DRM Game Object’s and generated DRM Live Object’s properties, especially Intensity value. If using incorrect values, shader calculated mask may be incorrect or not visible at all.
Do not update the same DRM node (or method) using several DRM Controllers.
If shader uses keywords for DRM activation, then make sure those keywords are listed in the DRM Controller's Keywords array.