Even though "the" isn't i the Greek, it is in the kjv...and that means something; because God preserved His unadulterated word in the English in our authorized, king james version...for the original autographs have been lost to us (and therefore you cannot be absolutely that "the" isn't in the Greek...it may have even been restored in the kjv as a Holy Spirit inducted translation.What do you mean by “even the Father”?
You’re making much ado about nothing—“the” isn’t in the Greek.
https://biblehub.com/interlinear/1_corinthians/12.htm
But even if "the" isn't in the Greek; and even if the kjv is invalid; and even if no one can say that "Jesus is Lord" except by the Holy Ghost...it should be clear that there is one Lord in holy scripture (Ephesians 4:5); so if Jesus is Lord, then He is "the" one Lord.
And what I mean by, even the Father, is made clear by the scriptures that I have referenced.
There is one Lord (Ephesians 4:5), that is, the Father (Matthew 11:25, Luke 10:21, 2 Corinthians 6:17-18). In that there is one Lord and the Father is the Lord of heaven and earth, it means that the Father is the one Lord.
Now, can you confess that Jesus is the one Lord in light of this information?