Desaturate Planar reflections

I have managed to get planar reflections working well in my game, with very minimal performance overhead.

However I find that the reflections have more colour saturation than I would like. Also I would like to add some ripples when the reflections are shown on a water surface.

Is there any way to add a post-process material to the PlanarReflectionComponent, or somehow render the planar reflections to a render target, that could then be sampled within a material ?

Or maybe there’s another strategy for adjusting the way reflections look, apart from the pre-filter roughness and metallic on the material ?