It’s been a while since I was there but East of Douglas, it’s just cow pasture fencing along a patrol road. And like that all the way to El Paso...
The fencing keeps moving East as we shift the traffic in that direction. It started in San Diego nearly a decade ago.
I haven’t been to the Slaughter Ranch lately, nor the wildlife refuge out there (San Bernardino?); but I believe the border fencing has improved since you were there.