Q.Gerbera daisies
Why are my gerbera daisy stems breaking? What do I do?

Are the flowers breaking off or bending over?
When the flowers began to fade they will bend over, it's best to go ahead and dead head them at that point by removing the stem at the base of the plant.
If you flowers are breaking off, it could be wind, animals or pests.
https://www.gardeningknowhow.com/ornamental/flowers/gerbera-daisy/gerbera-daisies-indoors.htm
https://www.gardeningknowhow.com/ornamental/flowers/gerbera-daisy/growing-gerbera-daisies.htm