To add this wave deformer, right-click on the "Realwave01" entry in the "Nodes" panel and choose Add Wave > Object Interaction.
Here you adjust how objects influence the RealWave surface. There is always a "Global Object Interaction" deformer. “Global” means that these settings are valid for all objects, but it is also possible to use individual “Object Interaction” deformers for selected objects instead.
Active
With “No” the deformer can be disabled temporarily.
...