Revelation 5:10 favors “reign over the earth” because epi with the genitive after “reign” marks dominion scope, not mere location.
Deep Dive into ἐπιγνώσει in 2 Peter 1:2 and the Possible Extra Meaning with the Preposition
ἐν ἐπιγνώσει in 2 Peter 1:2 expresses the sphere or means by which grace and peace multiply—through full, relational knowledge of God in Christ.

