Surely you are not saying that Jesus Christ, the Son of God, would be unable to tell a mulberry tree to be uprooted and planted in the sea? After all, Jesus...Matthew 21:19 Seeing a fig tree by the road, he went up to it but found nothing on it except leaves. Then he said to it, "May you never bear fruit again!" Immediately the tree withered.
If Jesus said ... John 14:12 Very truly I tell you, whoever believes in me will do the works I have been doing, and they will do even greater things than these, because I am going to the Father. Then the relocation of a mulberry tree, or a mountain, is not meant to be a metaphor.