Both of my Peace Lilies has been wilting for weeks
I know that I over fed them with miracle grow which initially caused this. About 5 days later, ran water over them, hoping to wash through. Still wilted, I waited for them to dry out & watered as usual. This is several weeks & still all drooping. All of the leaves are green & so are flower buds. (I have them staked & tied for them to stand, as the foliage droops to the base of the pot & there's a mirror behind each plant so you are seeing their rear in the photos also.)
Certified GKH Gardening Expert
Looks like you likely need to repot your Peace Lily plants.
Dropping for more then a week or two is a good indicator it's time to move up to a larger container.