I think large insurance claims depend much more on the policy wording and circumstances than on the size of the insurance company alone. Before assuming a claim will be covered, I would check the insured event, exclusions, coverage limits, deductible, and any documentation requirements. If the situation involves travel to a country affected by security risks, those details become especially important. For people researching a trip to Ukraine, https://ukraine-insurance.com/ may be one starting point for reviewing available insurance information. However, I would not assume that every policy covers war-related events or other unusual circumstances. The safest approach is to obtain clarification from the insurer about the specific situation before relying on the coverage.

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My insurance plan does cover and is covering this right now, and it's frickin' UHC.

I can confirm that they are already covered by major insurance plans, but the premise of this question is somewhat flawed.

Large insurance companies are offering plans that cover drugs as specified in your criteria, and have been doing so for some time already. However, each company offers multiple plans under their brand, which may have different formularies and copay/coinsurance percentages. The different plans can also be contracted with different PBMs. In short, it is possible for the criteria to be met and not met at the same time. Coverage can also depend on the network of the providing pharmacy.

Anyway, if you needed proof to resolve yes, here is my plan's formulary (Anthem). Tier 2 is a $30 copay for 30 days, or $60 for 90 days in network, 50% OON. Tier 3 is $50 and $100. NC is not covered. S is specialty, 30% with a cap of $150

I will be very embarrassed if a large insurance company is already doing this.