For those whose babies NEED breastfeeding / bottles to fall asleep, how did you get them to sleep without it??

My toddler can’t sleep without the bottle, either for naps or bedtime. I know according to doctors, he should have stopped bottles by now.

If we don’t give him the bottle, he’ll stay awake until he’s so exhausted he’ll pass out which is around 5pm.

I’m worried that quitting bottles will stop him napping all together but I feel a huge amount of pressure to quit ASAP. Would love to hear how other parents did it!