If Jesus is the “monogenes” Son of the only true God, by default, He has to be the same kind, that is, the only true God because a Son cannot be of a different nature than His FatherFather**(*)**!
Otherwise, He will be an illegitimate Son!
[(*) However, we know that the son of John (YHWH) cannot be John (YHWH) himself. But, the son of a human being (God) is definitely a human being (God).]