Can I create a volume that flattens landscape?

So I’ve tried asking this before, but in the past I’ve focused on blueprints and of course gotten answers that focused on that. The only other time I asked about C++, I was focused on landscape layers rather than height information.

I want to create a volume or other such object which, when placed on a landscape in-editor, flattens or smooths the landscape within a given radius from center.

It would not exist in run-time. It’s sole purpose is for procedural in-editor landscape alteration. Also, it doesn’t need to touch landscape material layers in any way. Just flatten the height information.

If this is NOT possible (yet?), is there anywhere we can request features? I’ve seen feature requests mentioned before but never figured out how or, rather, where to do that.