Girls, please tell me, can a baby learn to suckle? It's a stupid quest…

Girls, please tell me, can a baby learn to suckle? It's a stupid question, but I just don't know what to do, what to think, the baby was sucking on a bottle normally, now you give her formula like she's choking, it's right there, how she swallows, today I changed the pacifier, nothing changed, and she barely eats, I can't even understand what's wrong, what am I doing wrong