Dreamweaver did mention that he got the approval of the other Gods for TW. Though my theory, which at present is completely speculative since it isn't explained any further in the book presently, is that TW because of his physique could brute force his way into Godhood and Dreamweaver both approving of TW and not wishing for there to be unnecessary conflict, convinced his peers to allow it. I like to think that is the reason TW never mentions getting heavens approval because he would have done it regardless of whether he got their blessings.