I tried making a travel insurance medical claim 2 years ago (annual global cover) when I had a skin cancer removed in Asia and gave up trying to get the money out of the insurers as they kept on requiring more and more proof and doctor letters, not just from Asia but from my GP here in Oz despite me being a year away in Asia. I hope my basic American express insurance will cover me here on in. Not getting any more global cover.
I have three anti vaxer acquaintances in Asia, one just passed away and the other very crook, and another recovered after 2 months but still with long covid symptoms . I will be heading to Philippines early next year fully vaxed, fingers crossed.