They are an interesting prospect but their use isn't quite as claimed.

They are extremely vulnerable to the same drones humans are.

It's more along the lines of this is a patch were not expecting active fighting this robot can act as a deterrent and surveillance.

Cheaper and simpler than a loitering IRS drone. But more concentrated in domain.

I believe for a while Samsung developed similar drones for the demilitarised zone in Korea. Those could be static as they were hard wired in.