What do you think is the most effective way for companies to support diversity initiatives?
…and answered, by yours truly.
Stop carrying out diversity initiatives. Those are just unserious virtue-signaling nonsense.
Instead, businesses (among other entities) support and/or carry out their own training programs, and they should support K-12 charter, voucher, private school education, so as to build over time a population of qualified adults that is reflective of the population at large.
From that diverse population of qualified individuals, then select and hire based on merit rather than on virtue signals.