Speculating that if the company doing the transfer has already done the title transfer / records the deed in your name with the Clerk of the Court, you are the legal owner of the interval.
HOWEVER, it's doubtful Wyndham will transfer the contract into your name. So you will likely not end up with any points in Club Wyndham.
My experience is the way these timeshare transfers work is you pay the title company doing the transfer, then docusign all the documents and send back to them. The title company records the deed with the Clerk of the Court, and once that is complete, they send the Wyndham Contract transfer info to Wyndham who processes the points transfer. The Wyndham title department has been cancelling these transfers for resorts they know are closing, but they have no legal authority to "undo" the deed transfer, which is a real property transaction they have no ownership interest in.
What's worse is the people at Wyndham who will ultimately be doing all these conversions and payouts will likely see the previous owner's name on the contract and contact them. You won't be recognized as the owner.
This is a weird gray area, because legally you are the owner, but Wydham will try to pay the person they think is the owner when the property is ultimately sold.
Can you "undo" the deed registration? Maybe, but the previous owner would need to be willing I think.
I'm also not a lawyer but I think this is how it will work. Hopefully you are not out much money.