Being in HR, I can confidently say that I don’t really think that this is a big macro issue but definitely can demonstrate micro issues.
Presumably the individuals still have to pass the interview. The top of funnel may bias under represented groups but they still have to pass the interview.
A recruiter may be, and in many cases IS, rewarded monetarily with the amount or percentage of candidates they hire from URGs.
I know this because I created those systems.
Additionally, the issue which walks the fine line of legality is the hiring exceptions. If a hiring manager has only 1 headcount left and 2 candidates of equal qualifications, more often than not they will give special consideration to the URG candidate. This is because organizations have representation targets for their teams which their funding is dependent on.