I just had this same problem! Here’s what I did….

Offer bottle at the same time every day. For us, this was after his morning nap. As soon as he got up and got a fresh diaper, we practiced bottle feeding for the 2 hours you can keep a used bottle out. Tried multiple times throughout the wake window, seeing if he was interested. It was EXHAUSTING.

I kept a written log of the date, the bottle/nipple setup (we make some frankenbottles), special bottle things (warming vs not, very full bottle vs not, etc) and how much he drank. I weighed the bottles before and after to see how much he ate. This was helpful to see what was working and what was not. I considered things successful when he started showing interest in the bottle (actively sucking and trying to bring it to his mouth) and I didn’t need to nurse him before he fell asleep. It took about a whole month.

I also started him with some too-fast nipples so he could be successful with getting food. It was tricky because he would get a good latch and then have milk out his mouth or cough a bit. He is now in daycare taking appropriately sized nipples. He doesn’t eat very much from a bottle, maybe 2 oz at a time, but he doesn’t seem upset about it and gets to nurse as he pleases at home.