There have been lots of devices and methods worked on for taking unwelcome drones out of the sky. There was that stupid eagle programme, shooting them out of the sky, trapping them in nets, signal jamming and signal hijacking. And there have probably been other ways that haven’t been made public.
So far, though, I haven’t seen anybody suggest using one drone as a battering ram to literally knock the other drone off balance, causing it to crash (quite literally) to the ground. At least, not until now. But that’s the mission of the Anduril “Anvil”.