Ephesians 4:5 proclaims that there is one Lord.
Is this Lord not the Father (Matthew 11:25, Luke 10:21)?
Yet, no one can say that Jesus is the Lord, except by the Holy Ghost (1 Corinthians 12:3 (kjv)).
And, Jesus is the Lord (1 Corinthians 8:6).
If Jesus therefore is not the Father, then the Father is a separate Lord from Jesus Christ, then that is two Lords; and you have a contradiction to what it says in Ephesians 4:5.
I encourage you to look up the scriptures that I have referenced.
Be a Berean (Acts of the Apostles 17:10-11).