If the intention of the NT authors wasn’t to convey the message that Jesus is distinct and subordinate to Jehovah/Yahweh, then it’s odd that the OT text they applied most often to Jesus did exactly that - in Psalm 110.1 YHWH speaks to the Messianic “Lord” and instructs him to sit at his right hand. This verse is quoted and alluded to dozens of times in the NT, more often than any other OT text, and it shows that Jesus is a different “Lord” and subordinate to God.
NT scholar James Dunn says of the verse, quoted in the NT:
Its importance here lies in the double use of kyrios. The one is clearly Yahweh, but who is the other? Clearly not Yahweh, but an exalted being whom the psalmist calls kyrios. (2) Paul calls Jesus kyrios, but he seems to have marked reservations about actually calling Jesus 'God' (Rom. 9.5 is the only real candidate within the main Pauline corpus, and even there the text is unclear). Similarly he refrains from praying to Jesus. More typical of his attitude is that he prays to God through Christ (Rom. 1.8; 7.25; II Cor. 1.20; Col. 3.17), (3) 'Jesus is Lord' is only part of a fuller confession for Paul. For at the same time that he affirms 'Jesus is Lord' he also affirms 'God is one' (I Cor. 8.5-6; Eph. 4.5-6). Here Christianity shows itself as a developed form of Judaism, with its monotheistic confession as one of the most important parts of its Jewish inheritance; for in Judaism the most fundamental confession is 'God is one', 'There is only one God' (Deut. 6.4). Hence also Rom. 3.30, Gal. 3.20, I Tim. 2.5 (cf. James 2.19). Within Palestine and the Jewish mission such an affirmation would have been unnecessary - Jew and Christian shared a belief in God's oneness. But in the Gentile mission this Jewish presupposition within Christianity would have emerged to prominence, in face of the wider belief in 'gods many'. The point for us to note is that Paul can hail Jesus as Lord not in order to identify him with God, but rather, if anything, to distinguish him from the one God (cf. particularly I Cor. 15.24-28; see also below pp.225f.). So too Jesus' Lordship could be expressed in cosmic dimensions without posing too many problems to monotheism, since Wisdom speculation provided a ready and appropriate terminology (particularly I Cor. 8.6; Col. 1.15-20; Heb.1.36.; see below pp.220f.).
James DG Dunn, Unity and Diversity in the New Testament: An Inquiry into the Character of Earliest Christianity (1981), page 53.