For myself, I’ve never once heard him speak of modern Eucharistic miracles or actually promote the novus ordo. What he HAS said is that he hasn’t the authority to declare the novus ordo dogmatically invalid. He has also said he does NOT recommend attending it, but acknowledges there are likely still older people who attend and still have the Faith, also, that some novus ordo priests are on their spiritual journeys, en route to becoming fully traditional.
Here is what Bishop Williamson says, in his own words, about attending the Novus Ordo:
https://youtu.be/casxXTtQFPs?t=5761At the timestamp provided above, Bishop Williamson is telling a young traditional Catholic that
HE should not rule out attending the Novus Ordo. He says, "you don't have to stay absolutely away [from the Novus Ordo]."