Good idea: here is what mark says, no mention of it being an immediate delivery in the actual account. There are other instance of the use of the word immediately though in other chapters and it appears as though it means “right away”.
Mark 6:45 Immediately after this, Jesus insisted that his disciples get back into the boat and head across the lake to Bethsaida, while he sent the people home.
Mark 6:47 Late that night, the disciples were in their boat in the middle of the lake, and Jesus was alone on land.
48 He saw that they were in serious trouble, rowing hard and struggling against the wind and waves. About three o’clock in the morning Jesus came toward them, walking on the water. He intended to go past them,
49 but when they saw him walking on the water, they cried out in terror, thinking he was a ghost.
50 They were all terrified when they saw him.But Jesus spoke to them at once. “Don’t be afraid,” he said. “Take courage! I am here!”
51 Then he climbed into the boat, and the wind stopped. They were totally amazed,
52 for they still didn’t understand the significance of the miracle of the loaves. Their hearts were too hard to take it in.
Mark 5:29 Immediately the bleeding stopped, and she could feel in her body that she had been healed of her terrible condition.
So what should we think of this? John doesn’t mention the winds stopping, and Mark does. John says immediately, and Mark doesn’t.
Further, I notice John mentions Jesus telling the disciples to pick up the extra so none is wasted. I was really mesmerized by the fact that the abundance of extra food came from the scraps. Jesus chose not to make the miracle obvious. He could have just multiplied the food from the start, but instead it happened subtly from the scraps. That seems so significant to me. But Mark misses that emphasis when telling the story.
Do you think Jesus used the wind to push the boat to the destination? And the winds stopped when they arrived?