All apostles and prophets were Jews and they are no more. Notice the use of the past tense in the passage below.
Now, therefore, you are no longer strangers and foreigners, but fellow citizens with the saints and members of the household of God, having been built on the foundation of the apostles and prophets, Jesus Christ Himself being the chief cornerstone, in whom the whole building, being fitted together, grows into a holy temple in the Lord, in whom you also are being built together for a dwelling place of God in the Spirit.
What advantage then has the Jew, or what is the profit of circumcision? Much in every way! Chiefly because to them were committed the oracles of God.
EGW could not be a prophetess. She was not a Jew and they are no more. Scripture was complete for almost two millenia before she came along.