Only 14 miles of that 216 miles is new. The rest is just replacement, which is already being cut through with power tools available at Home Depot.
The 216 miles of new wall has many sensors and cameras that get the CBP to the areas where the migrants are trying to breach the wall.
The 216 miles of new wall is working just fine thank you, way better than the old ineffective wall it replaced.
We had to build a new wall so we could hang sensors on it?
But, nevertheless, I live 35 miles from Nogales, and hundreds to thousands cross at that border point everyday, and nobody checks to see if they go home. But, if ruining the environment with a useless wall is your thing, go ahead. we'll tear it down in 2021.