I had some experiences with every bank on 13th Avenue and these types of accounts. Every single one closed the old account and opened a new one or issued a check. I did not try to specifically keep the old account type.
TBH, at this point I'm not sure if it's really worth the effort in order to get the benefit of free cashier's checks and discounted safe deposit box at TD with a $250 minimum balance. Might have been worth keeping if I had changed myself from POA/POD to co-owner at an earlier stage. And since there's no Social Security death record, it might be simpler to just withdraw the balance and let the bank shut it down.