Q.Peace Plant Not Thriving.
I have a peace plant it was going well but now lost a lot of leaves not sure how to revive it I had too cut it right back?.

Certified GKH Gardening Expert
If the leaves were yellowing or browning, I would be concerned about over or under watering. Cutting back dead or damaged leaves is fine at any time. These articles should help:
https://www.gardeningknowhow.com/houseplants/peace-lily/watering-peace-lilies.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-plants.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-fertilizer.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lilies-getting-brown-tips.htm