Q.How Can I Tell If My Ocotillo Is Dead?
I have a rather large ocotillo that was transplanted into my yard from a construction site. It was alive when transplanted, and was placed 10-15 feet away from another live ocotillo. It has not sprouted any leaves, so I’m wondering if it is dead with no hope of coming back to life.

Certified GKH Gardening Expert
I would give it more time. It may be establishing its root system rather than growing leaves. The article below says it can take 6 to 12 months to establish and start growing leaves. Continue to water it until it starts leafing out, then you can let rain do the watering.
https://www.gardeningknowhow.com/ornamental/cacti-succulents/ocotillo/ocotillo-plant.htm