It might even be demonstrably securities fraud.
https://wp.nyu.edu/compliance_enforcement/2022/06/22/can-sec...
Much greater incentive to absolutely silent rejection. You know nothing you can't sue.
TLDR Have your paper trail in order if you suspect illegal behavior, everything else is then logistics with counsel and/or regulators.
(not an attorney, not your attorney)
walk them right into small claims for 25k
Discrimination (including "unemployment discrimination") during interviewing should be an automatic, hefty fine, with a significant portion going to the target of the discrimination (assuming the claim is found to be valid). Just riffing, maybe set the fine to something like the equivalent of total yearly compensation package for the average employee in the position being sought. That would be penalty enough to encourage putting it right in the front of any training for anyone making offers, particularly HR.
This is exactly how I feel about tenant laws in the US. It's great they exist, but who's going to get a lawyer to stay somewhere they aren't wanted. All these laws that protect the vulnerable still require a lawyer to enforce them. Lawyers aren't accessible to most.