Q.Regarding Peace Lily
peace lily’s leaves are curling and one of its stem is bending like it has no energy left in it. i never overwater this, always check before watering. i have kept it indoors near a southeast window where it gets whole day indirect light. this is kept 1 feet away from the window.

Certified GKH Gardening Expert
I do see signs of overwatering, unfortunately.
With a container that has no drainage holes, the top can be bone dry, but putting a moisture probe to the bottom of the pot will often reveal pooling, or saturated soils.
With container that have no drainage, the soil must dry, almost completely, to the very bottom.
Bone dry, down to halfway, will be the best way to describe when the plant needs water in this type of container.
I recommend treating with a mild fungicide, then potting up into a slightly larger container with drainage holes and a saucer. This will allow extra water out, and you can water as you normally would with a container plant.
Unfortunately, watering a container with no drainage can become very tricky, since the top being dry will be very deceiving.
Once treatment is done, and it is put into a new container with plenty of unobstructed drainage, it will recover quite nicely.
Here are some articles that will help:
https://www.gardeningknowhow.com/garden-how-to/info/using-fungicides-in-garden.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/when-to-repot-peace-lilies.htm
https://www.gardeningknowhow.com/houseplants/peace-lily/peace-lily-plants.htm