Have any UAVs been developed for close air support? Seems like one of the riskier tasks for human pilots. I wonder if command latency is more of an issue for lo

Have any UAVs been developed for close air support? Seems like one of the riskier tasks for human pilots. I wonder if command latency is more of an issue for low-and-slow gun runs? EDIT: Looks like DARPA is working on it, sort of: https://en.wikipedia.org/wiki/Persistent_Close_Air_Support https://en.wikipedia.org/wiki/Persistent_Close_Air_Support