This sad article tells of how AMEX card complimentary travel insurance rejected the claim of a traveller who died in the NZ Volcano eruption.
Buyer Beware - though unfortunately I suspect this sort of rubbish happens in more than just this insurance.
https://www.abc.net.au/news/2021-08-25/family-of-white-islan…
”Chubb Insurance, which underwrites insurance for American Express, recently wrote to lawyers representing Mr Griffiths's family rejecting the claim because he was "touring" the island and not being transported to or from the cruise ship.“
Amex have since changed underwriters and their insurance is even worse now. Even so, any insurance company will use whatever they can to get out of paying, make sure you read the PDS and cover yourself for what you may need. Different credit card companies use different underwriters and even different cards offer different coverage you just need to read the fine print regardless if it's included in your credit card or you buy it separately.