Girls, can you help or give advice? A baby born at 36 weeks, two-sided…

Girls, can you help or give advice? A baby born at 36 weeks, two-sided pneumonia, on the fourth day since they removed the ventilator, the breast is not taking a bottle to suck, doesn't want to suck if it does, then only up to 15 ml as how to teach her to suck and will she learn to eat normal amount of food without a tube ??? We feed through a tube during sleep.