As we SEE: EVEN THE DEVIL, DID NOT, BELIEVE JESUS WAS GOD.
The devil said to him, “If you are the Son of God, command this stone to become bread.” Luke 4:3.
Satan was an anointed Cherub( Ezekiel 28:14) who rebelled against God, who was among the highest of all angels and the brightest in the sky. His pride is considered a reason why he would not bow to God as all other angels did but sought to rule heaven himself.
Satan being among the highest of all angels would certainly have known GOD is GOD ALONE, which is obviously why he addressed Jesus as the Son of God in Matthew 4:3, and Matthew 4:6, and NOT as GOD.
Satan had already known, that If Jesus was GOD, Jesus could not be tempted, because GOD cannot be tempted as Jesus WAS.
Let no one say when he is tempted, “I am being tempted by God,” for God cannot be tempted with evil, and he himself tempts no one. James 1:13.
There is NOTHING in Matthew 4: teaching GOD IS THREE called the Catholic TRINITY.
Matthew 4:6, is just one of COUNTLESS Biblical FACTS, that proves Jesus is NOT GOD, but the LITERAL SON of, His GOD.