Hell is the only irrevocable chattel of Satan. The earth is a battle ground, and things in it need not be yielded to Satan, though weak Christians often cede it as a result of overly wooden theology. Think: if the earth were entirely Satan’s, there would not be any healings. It only “belongs to Satan” in a relative sense. The New Testament term “world” is more closely aligned with what Satan actually does rule.
I'll just say God Bless and continue to fight for what's right in the spirit of The Light...I know you will too FRiend!!