We have a huge amount of data around physical size being inversely correlated with lifespan. The bigger you are, no matter what drives it - height, muscle mass, body fat, etc. - the lower your life expectancy is.
Obviously lots of other factors, but it does help explain part of why we see much of the most developed portions of Asia at the top of the list.
Switzerland is an interesting counterpoint, though - average height there is taller than most of Europe - though their obesity rates are about half of that of the European average.
It's still correct, but like most things related to human health, there are many different factors at play. The practical consideration for most people is not just getting too much, or having high levels of both muscle and fat, increasing your total body size more than just being one or the other.
Higher muscle mass tends to mean better insulin sensitivity, a higher general level of physical fitness, etc. etc. etc. These are all larger beneficial improvements than the problem with just being a larger person.
But if you look at two people of different heights, the same FFMI, etc., the larger person will have lower life expectancy, and it's not because their head is a few inches higher in the air, and despite having a similar body composition and more total muscle mass. (Obviously controlling for all other variables)
We know that blood flow demand increases put additional strain on the heart. We know this is one of the causes of things like LVH and other negative cardiac remodeling. We know that at rest, muscle and fat mass have essentially identical blood flow requirements. Even natural powerlifters when having their heart scans have found increased septum and posterior wall thickness without the increase in chamber size that endurance athletes have that keeps function optimal - they have diastolic function loss. In fact, in many of the negative imaging results, they found minimal difference between natural powerlifters and enhanced - https://pubmed.ncbi.nlm.nih.gov/4079743/
People get obstructive sleep apnea from too much muscle mass, even at low levels of body fat.
On the enhanced side, we see better health outcomes from people that both drop the AAS usage alongside letting them size go down vs. those that just come off the gear. (You can keep very significant portions of your enhanced gains while at physiological levels, as long as you maintain strict training, protein intake, etc. It's one of the reasons that many people argue that the 7-10 year bans in natural powerlifting federations is not actually effective.)
It's a u shaped curve. At some point all of the health benefits of muscle can't make up for the increased cardiovascular strain. The majority of people have more risk from their less-muscular body composition so building more will almost certainly benefit them, but that's not the same as the idea that body size, from any cause, doesn't have a negative correlation with longevity.
Obviously lots of other factors, but it does help explain part of why we see much of the most developed portions of Asia at the top of the list.
Switzerland is an interesting counterpoint, though - average height there is taller than most of Europe - though their obesity rates are about half of that of the European average.