Thank you for these tips and links, though none of them address travel-abroad-related medical insurance coverage in the kind of detail that the subject deserves -- especially in the wake of lessons learned from travel during and in the aftermath of the Covid-19 pandemic.
General articles like "Make Your Dream Vacation Stress-Free" in Consumer Reports or AARP's "How to Pick the Right Travel Insurance" do not focus on medical insurance needs.
Therefore, I recommend that AARP give this topic of huge relevance to seniors the priority it deserves, commissioning at least one in-depth article on it for the Health and Travel sections of this website, to be updated on a yearly basis.
And it should include links to reputable insurance companies and insurance brokers offering coverage for travel-abroad medical contingencies for those over 65 years old.