Don’t fault Metlife for being subject to Public Law 95-507 as amended and “improved” over the years. Any company wanting to do business with the government in any capacity needs to submit a minority and disadvantaged owned business subcontracting plan. For Metlife and other financial institutions, if they want to offer funds for 403b participants, they have to tell the government how much business they do with these companies.
In which case, it is to the advantage of any vendor to check "Yes" to "LGB-LGBT Owned", and claim you are Bi. How are they going to prove you're not? This way, they can say they checked the right boxes, and also get a competent vendor.
There are times I regret not marrying a certain Egyptian (Copt) girl I knew. She could legitimately claim being African-American (Egypt is in Africa), be the official owner of the business, hey we would have cleaned up.