Is there such a thing as using the bottle to soothe at 9 weeks?

Hello! FTM here. My 9 week old has overall been a great baby—doesn’t really fuss or cry except when he is hungry or gassy. He will even happily sit in his poo so I have to constantly smell his butt to check lol. He only sleeps in the snoo at night and he naps on me/next to me on a lounger during the day.

Anyway in the last week, he has increased fussiness. He will drink 4-5 ounces, nap for less than an hour, wake up fussing, i pick him up and if he continues to cry I give him the bottle (I combo feed and exclusively pump due to latch issues), he drinks it verrrrry slowly (maybe another 2 oz in 30 mins) and fall asleep while feeding but when i take the bottle away he wakes up and cries. It almost never gets to the point where he is screaming except maybe at night when he wakes up from a 4 hour stretch.

It seems he is eating all day but he still wakes up twice per night to eat some more. He was in the 49th percentile for weight at his 2 month appointment. Once to twice a day he would spit up a small amount of partially digested milk.

Is this normal baby behavior? Should I give him the pacifier instead? It seems he is too young to try to limit feeds, but will giving him the bottle immediately after every small cry affect his ability to soothe himself? Should i upgrade to a bigger bottle? These are probably dumb questions but i am not directly breastfeeding and I don’t know if it’s just normal for a baby to be on the boob for the better part of the day?

Thanks in advance!