Congrats on almost 12 months.
I went thrpugh something similar around the same age. Jacob went from sleeping through to waking every few hours overnight and I was plain exhausted. It took me till he was aound 13 months to go right enough. I simply refused to feed him.. DH got up to him when he wasn't working the next day or we just ignored him (mean I know but boy was it worth it) it took a few nights but he stopped waking. As you co sleep Just offering a cuddle might be fine. They all develop habits and his is as soon as he starts to wake is to go in search of comfort.

Good Luck. I hope you start getting some tummy sleep soon lol..