Q.Peace Lily
Will peace lily leaves uncurl when it is repotted?

Peace Lily actually prefer to be a bit root bound. Make sure the plant is receiving bright but filtered light.
Here are some links to refresh you on the care requirements.
https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-plants.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/repotting-peace-lily-plant.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/diseases-spathiphyllum-tips-treating-peace-lily-diseases.htm