The Bible teaches Jesus is God in John 1:1, John 5:18-23, John 8:24, John 8:58, John 10:30, John 14:9, John 20:28, Romans 10:13, Philippians 2:5-11; Titus 2:13, 2 Peter 1:1, 1 John 5:20, Revelation 1:8, Revelation 1:17-18, Revelation 22:12-13, and other Scriptures from the Old Testament (Genesis 1:26-27; Genesis 19:24; Deuteronomy 6:4; Isaiah 44:6; Isaiah 45:23; Isaiah 48:16).
Isaiah 43:10 teaches about Jehovah God, the LORD.
Ye are my witnesses, saith the Lord, And my servant whom I have chosen: That ye may know and believe me, And understand that I am he: Before me there was no God formed, Neither shall there be after me.
Isaiah 43:10
According to Isaiah 43:10 there was no God created before Him and there will be none created after Him. The Hebrew word for formed is yastar which means to be made, created, formed, fashioned, framed.
Some cults teach Jesus was a created God, however Jesus is God and existed in eternity past as the Word, and is Creator as a member of the Godhead, not a creation