It does sound that way, but "bioidentical" is generally an issue with pills, I believe. So you might still be able to get, say, HRT by cream or patch; I'd be shocked if they didn't cover what a menopausal cis woman might need in ANY way whatsoever. Also, sometimes, "bioidentical" is used to mean "made by a compounding pharmacy," which it's not uncommon for an insurance company to reject. You need to find out specifically what it is they mean by this exclusion.
You can also sometimes have a doctor appeal an exclusion, since arguing that it's medically necessary - that non-bioidentical types don't work well for you - will sometimes get you an exception. (Speaking of asthma medication, my wife had to do that once to prove that a brand-name albuterol inhaler worked better for her than the generic, and it's a rescue med so you want it to work! Getting a doctor to claim it was medically necessary convinced the insurance company to pay for it even though it was "non-formulary.")