It is true that a longer period between his afternoon nap and his bedtime will make it easier for him to fall asleep. But that does not explain why he now struggles to fall sleep through.
That said, a change in routine can upset any baby. If your baby is growing and developing normally at 10 months, he should not need any feeding at night. The bottle has become a crutch to help him fall asleep again. You will have to teach him to fall asleep without the help of a bottle; then he’ll be able to sleep through the night again.
It will take patience and effort but the good news is: if you persist for a week and you’re consistent, everything will return to normal. Put your baby to bed and stay in his room, patting him gently to teach him to go to sleep without a bottle. Stop patting him as soon as he’s calm, but stay in the room until he’s asleep.
Persevere with this. It should not take more than a week for him to establish a good sleeping routine again.