Don’t forget that the lower the return signal from the stealthy target, the higher gain required by the receiver to reliably detect a signal. This also makes such radar more susceptible to jamming, and the jamming signal doesn’t need to be as powerful, making jamming pods smaller.
It would also be fairly easy to deploy decoys that could passively or actively emulate a larger target in the lower frequencies, further complicating any attempted intercept.
You start jamming and they you absolutely tell them something is up. I’m just telling you that stealth isn’t the cure all. I know better.