The company I worked at had a diversity interview rule like this, but it’s not really clear to me how it’s legal. Isn’t it literally making hiring decisions based on protected attributes?
If unqualified people get their time wasted by being invited because they fulfill some diversity quality, but no skill quality; I'll put the blame on the system that imposes the rule.
For example, if someone selling a house chose which prospective buyers were allowed to tour the house based on race, I assume that would definitely be illegal, even if the "final decision" on who to sell to was ostensibly not based on it.
I think the courts would take a dim view of claiming that a procedure to partly mitigate bias regarding attribute X is somehow illegal discrimination along the same attribute.