Yes, most Church Fathers did not believe in BOD, but the majority, if not all, believed in BOB.
Now we can move on to the next question, does it really matter? The Church Fathers are not the magisterium.
Thank you. Correct, they are not the Magisterium. There is, however, this notion taught by all theologians that they can reflect the Deposit of Revelation.
There are only three ways in which a doctrine can be definable as revealed dogma:
1) found in Scripture
2) shown to be of Tradition by unanimous consent of the Fathers
3) derives necessarily from other revealed premises
Now, #3, some theologians would describe as "de fide ecclesiastica" vs "de fide revelata".
Based on reading the Fathers, there's no indication or proof there that any dogma of bod was revealed by Our Lord, or in Scripture ... as interpreted by the Fathers and Tradition.
So if bod can be classified as a dogma, it must be in category 3.
But I have never seen any theological proof of #3.
When you look at the first "Magisterial" mention of bod, in Pope Innocent II (or III), he stakes its existence directly on the "authority of Augustine and Ambrose" and is not teaching it with his own authority. So the link is that he's opining in favor of it based on Patristic authority. But, as we have seen, there is in fact no Patristic authority behind a bod that suffices for salvation. St. Augustine was clearly speculating (in his own words) and then retracted it. St. Ambrose, on the other hand, believed that it could "wash" from sin but not result in the "crowning" (entry into the Kingdom and Beatific Vision).
So his reason for opining in favor were not valid. There is in fact no authority of Ambrose and Augustine behind this. And he ignores (or, more likely, is unaware of) the contrary teaching of 5 or 6 Church Fathers.
Then the other Magisterial backing for bod is in Trent, but Trent is speaking of justification, not salvation ... and post-Tridentine theologians clearly distinguish between the two, so that too is no proof of a SALVIFIC bod.
St. Thomas comes close to making some theological argument, namely, that Sacraments include both a visible and invisible aspect, but he does not prove that they are separable in Baptism. They are, in fact, inseparable in Holy Orders, for example.
So the entire theological history of bod rests on the "authority" of Augustine and Ambrose. Once you pull that out, the whole thing collapses like a house of cards.