Q.Broken cactus
My dragon fruit cactus (Hylocereus) got a crack in the main stem while I was repotting it (it’s very top-heavy). The crack is not all the way through the stem and I was able to seal it using the weight of the plant. How should I care for the plant? Will the crack heal? Or will it start to die?
I would go ahead and prune the plant to eliminate the break.
You can actually go ahead and propagate the cuttings from the plant.
Here is an article with more information.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/dragon-fruit/how-to-grow-dragon-fruit.htm