Q.My Dwarf Pomegranate Tree
Lost all leaves and looks dry I tried everything from watering to fertilizing light and sun light but no leaves or dont look healthy I change pots too

Certified GKH Gardening Expert
That is a lot of stress for a young tree to endure!
Pomegranates are not heavy feeders, and will go into shock with too much fertilizer. The same can be said for overwatering, as they are somewhat drought tolerant. Combine this with shocking the roots from transplant, and it will be a recipe for the tree's quick demise.
For now, you can snap the twigs back until you find some that doesn't break, but has some elasticity to it. This will be where the tree is still alive. Anything that is brittle is dead, and can be safely removed.
If the tree is still living, you will want to hold off any extra care, and just give it the bare minimum for survival until it recovers. Unfortunately, too much care will be the death of these trees.
Luckily, they will go through a dormancy, which can save the tree in the event of great stress.
Here is an article that will provide proper care for this tree in container during winter: https://www.gardeningknowhow.com/edible/fruits/pomegranate/pomegranate-winter-care.htm

As a general guideline, Punica granatum ‘Nana’ (Dwarf Pomegranate) should be planted in well-draining soil and in an area that receives full sun. As a drought tolerant plant, this dwarf pomegranate bush thrives in hot, dry summer areas and has low water needs.
Since the plant has been through a bit of shock and should it still be alive after removing any dead branches, it would be best to leave it alone in an area that receives at least 6 hours of bright/direct sunlight and add water only after the soil has completely dried.