You can always try and see what happens. My first was ff and she needed milk over night until 13 months. We coslept and she was cuddled and rocked to sleep and she didn’t have milk before a sleep so I know she was genuinely hungry/thirsty. It maybe that your lo needs milk during the night still.
I BF my son until around 7 months. I then bottle fed when he woke in the night and I slowly reduced the amount I gave him until it was really little (like 50ml) and eventually stopped giving him anything. So much harder to do when BF though.