Unifi has an AR app for working with their switches[1] that shows some HUD info for each port. I've never used it on my switches personally and judging by that video it's more trouble than it's worth. But it exists. I suppose in a large data centre this might be useful, but the technology still seems pretty immature.
Related tech that got traction is BLE in servers with corresponding apps, like Dell Quick Sync. Lets you flash the ID light of a server from your phone, among lots of other things.
https://www.theverge.com/2017/9/12/16272904/apple-arkit-demo...
And what commercial applications of this have we seen in the last 4 years?