Is There Something Interesting in the Background Noise of Gravity in the Universe?

There are theories that suggest it might be out there and could contain like treasures of the uni s. And people have looked for it, but we don't really have conclusive evidence for it so far. Like ligo and vergo, our best gravitational wave detectors have looked for ut very specifically. But what they see looks to them just like noise in their detector. The theory pretty much predict that it exists, we just can't measure.